The 4001 trussrods come out through the headstock side of the neck.

I tape the headstock and use a cotton cloth to protect it from the truss rod.
I also clamp the fingerboard during trussrod removable because you do have to pull up on it a bit as you pull it out.

I checked the trussrods, made sure the tape was on the two inner side of each rod.

I also made sure the arc was even across the length of the rods and gave a little extra to the arc.
This truss rod which was on the treble side had a blunt end, I was given advise by a very knowledgeable man to give the end of the top half, a shape a more a chisel.







