
HERE'S THAT CAPRI!
Moderator: jingle_jangle
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skeeterbuck
- Junior Member
- Posts: 165
- Joined: Tue Jun 01, 2004 5:00 am
Super job and explanation as always Paul!
Of all the threads on the Forum, I think these restoration ones are my favorites.
By what work I have seen that you have done in the past, I'm sure that it will be fantastic!
The knowledge we all gain from these "lessons" makes us realize that almost any guitar can be brought back to life in the right hands.
Of all the threads on the Forum, I think these restoration ones are my favorites.
By what work I have seen that you have done in the past, I'm sure that it will be fantastic!
The knowledge we all gain from these "lessons" makes us realize that almost any guitar can be brought back to life in the right hands.
- jingle_jangle
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Next installment: replacing the back.
As I mentioned above, injudicious (love that word--it means "careless" but sounds more impressive) sanding had made a mess of the back, as the topmost layer of veneer had rounded the two cutaway tips and exposed the much darker crossply layer underneath. I suppose I could have cut the veneer away and re-veneered it, but I chose to cut the back away entirely and replace it with new plywood, then veneer the plywood, as the maple plywood I was able to get was too light in color and too plain-figured.
I removed the badly-disfigured binding with a small and very sharp wood chisel, onch by painful inch. I tossed the bits of celluloid into a pint can of ethylene dichloride, to make binging "mud", the glue that I use to re-bind this and other project guitars. The factory and many luthiers use acetone instead of EDC, but years ago I found out that EDC penetrates and melts better and holds much stronger than acetone-based "mud". It's much more aggressive and sets up faster.
Here's the guitar, set up in one of my mills, ready to trim away the plywood back:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/clamped.jpg
It's propped on the mill table with two strips of 19mm poplar, so the fretboard is clear of the mill table. Next, I check it for level (it was within .010"--close enough) and proceed to machine away the edge of the plywood until I hit "air" (mill past the glue joint). I do this all the way around the guitar, and also concentrate upon the neck pocket, which I want to expose and render absolutely level and flat.
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/ohno1.jpg
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/neckpocket.jpg
When I've gone all around the perimeter of the guitar and trimmed away all the plywood over the neck joint, the back is lifted off to reveal the very simple internal structure:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/inside.jpg
Here are two shots showing the internal structure, which is quite rough-cut and has a hand-hewn look. It's simple--a diagonal cross-brace, which is not attached to back or front, but floats; and a tailblock to reinforce the bottom and provide an anchoring place for the strap button.
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/structure.jpg
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/structure2.jpg
Note that the insides of the cutaways and the very bottom of the guitar, because of the unique construction method, are endgrain and quite susceptible to splitting and cracking. This guitar exhibits none of these defects, though--it is as solid as the day it was minted!
Next, the guitar's outline was traced onto a new piece of 1/4" maple-faced plywood, which was cut and sanded on a disc and spindle sander to slightly smaller than the guitar--about .030" all around. After gluing, the plywood's edge was routed for the new binding channel.
As I mentioned above, injudicious (love that word--it means "careless" but sounds more impressive) sanding had made a mess of the back, as the topmost layer of veneer had rounded the two cutaway tips and exposed the much darker crossply layer underneath. I suppose I could have cut the veneer away and re-veneered it, but I chose to cut the back away entirely and replace it with new plywood, then veneer the plywood, as the maple plywood I was able to get was too light in color and too plain-figured.
I removed the badly-disfigured binding with a small and very sharp wood chisel, onch by painful inch. I tossed the bits of celluloid into a pint can of ethylene dichloride, to make binging "mud", the glue that I use to re-bind this and other project guitars. The factory and many luthiers use acetone instead of EDC, but years ago I found out that EDC penetrates and melts better and holds much stronger than acetone-based "mud". It's much more aggressive and sets up faster.
Here's the guitar, set up in one of my mills, ready to trim away the plywood back:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/clamped.jpg
It's propped on the mill table with two strips of 19mm poplar, so the fretboard is clear of the mill table. Next, I check it for level (it was within .010"--close enough) and proceed to machine away the edge of the plywood until I hit "air" (mill past the glue joint). I do this all the way around the guitar, and also concentrate upon the neck pocket, which I want to expose and render absolutely level and flat.
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/ohno1.jpg
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/neckpocket.jpg
When I've gone all around the perimeter of the guitar and trimmed away all the plywood over the neck joint, the back is lifted off to reveal the very simple internal structure:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/inside.jpg
Here are two shots showing the internal structure, which is quite rough-cut and has a hand-hewn look. It's simple--a diagonal cross-brace, which is not attached to back or front, but floats; and a tailblock to reinforce the bottom and provide an anchoring place for the strap button.
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/structure.jpg
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/structure2.jpg
Note that the insides of the cutaways and the very bottom of the guitar, because of the unique construction method, are endgrain and quite susceptible to splitting and cracking. This guitar exhibits none of these defects, though--it is as solid as the day it was minted!
Next, the guitar's outline was traced onto a new piece of 1/4" maple-faced plywood, which was cut and sanded on a disc and spindle sander to slightly smaller than the guitar--about .030" all around. After gluing, the plywood's edge was routed for the new binding channel.
“I say in speeches that a plausible mission of artists is to make people appreciate being alive at least a little bit. I am then asked if I know of any artists who pulled that off. I reply, 'The Beatles did.”
― Kurt Vonnegut
― Kurt Vonnegut
- jingle_jangle
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Here's the body resting on my work table (on those poplar strips again), wetted with yellow glue, with the new back in the background.
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/backready.jpg
You will note that I haven't attempted to strip the old finish yet--that will come after the back is glued and routed. Next, the back is weighted with two 50 pound weights and clamped wherever it's needed. Excess glue is removed with a damp cloth.
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/weight.jpg
Here's the guitar with its new back:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/backdone.jpg
And a detail shot of the binding channels in front and back edges:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/edges.jpg
Now it's time to strip and sand the old nitro off:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/stripper.jpg
And a few shots of the body after sanding:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/det2.jpg
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/frontsanded.jpg
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/finfret.jpg
Oddly, the binding channels are slightly wider than 1/4" and slightly deeper than 1/16", so standard binding will not fit. I ordered oversized celluloid from one of a very few supply houses that still stocks it in the USA. It will be cut down and scraped once in place.
I also will be veneering the front and back in a very nice birdseye maple, with a wonderfully deep and glamorous figure. I've got a few more surprises in store to turn this guitar into a spectacular showpiece. Again, stay tuned!
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/backready.jpg
You will note that I haven't attempted to strip the old finish yet--that will come after the back is glued and routed. Next, the back is weighted with two 50 pound weights and clamped wherever it's needed. Excess glue is removed with a damp cloth.
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/weight.jpg
Here's the guitar with its new back:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/backdone.jpg
And a detail shot of the binding channels in front and back edges:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/edges.jpg
Now it's time to strip and sand the old nitro off:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/stripper.jpg
And a few shots of the body after sanding:
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/det2.jpg
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/frontsanded.jpg
http://img.photobucket.com/albums/v693/jingle_jangle/1960%20365%20CAPRI/finfret.jpg
Oddly, the binding channels are slightly wider than 1/4" and slightly deeper than 1/16", so standard binding will not fit. I ordered oversized celluloid from one of a very few supply houses that still stocks it in the USA. It will be cut down and scraped once in place.
I also will be veneering the front and back in a very nice birdseye maple, with a wonderfully deep and glamorous figure. I've got a few more surprises in store to turn this guitar into a spectacular showpiece. Again, stay tuned!
“I say in speeches that a plausible mission of artists is to make people appreciate being alive at least a little bit. I am then asked if I know of any artists who pulled that off. I reply, 'The Beatles did.”
― Kurt Vonnegut
― Kurt Vonnegut
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- trick_knee
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- jingle_jangle
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