||| 16. Back board
Either ribs backboard, laminate wood use.
My Macintosh is very old model 6100/66AV(+G3 card).
Cut around curve fit.
Usually, Glued laminate woods are heavily warp! But the warp is good tension for guitar .
My original back bars are bery large size. Need just arch.
Glue bars to backboard.
Shave bars peak edges.
This peak style is my original bar.