Now with the 2 form pcs on the bench, we make sure we have 1 1/8" max all along the form. Then I put a strip of ply on both ends to hold in place...
And check square across centerline, and put a pc on there also to keep top and bottom form centerline lined up...
Only one place on this form bout 8" on one end where I got wide from line. Probably should try to stay right on line and have help to catch the form coming out of bandsaw!This form ran the same all the way after cutting top and bottom apart, some will require trimming no matter how careful you cut...
Here is only spot that needed trim. BTW-- the top form that the airhose is against doesn't have to be sanded smooth.
Now to make room for the riser, I lay something in the gap slightly thinner than the form so I can put the riser up against the bottom of form and mark the top...
With the riser pattern in place, mark the 1 1/8" around the riser template...
Cut to the line and you have your riser area done..