rickyfricky wrote:That's a great brain puzzle, Bert!
I think I solved it:
--MG out
--FG in
--MID to GMB (Gun Metal Blue)
You figured it out right. ('73 4001 MG out, '96 4003S/8 FG in, '86 4003 MID BT/BH/Fl transformed.) It is not GunMetalBlue though. Just another grey. And it now has an ebony FL board.