Brief Description: Mark hole locations on Seat back vertical angle.
I’ll be drilling the angle first and then match drill the seatback through the angle. But the seat back dictates the location of most of the holes.
I clamped the angle to the seatback and made small marks on the angle where the curve of the seat back starts and ends. The holes in the angle will be 5/16 outside this start and end of the curve in the seatback.
Then expand the previously marked radius start and end by 5/16” on both sides.
