I'm not sure where to put the extra I need...say I have a seat that's 17" x 24" I know I need an extra 2" for stapling, making the piece I need 21"x 28" now I have a 3" cushion on the seat, where do I account for that?
2" underneath for stapling- 3" up for foam allowance- 17" across seat base- 3" down other side for foam - 2" under for stapling= 28"
Do the same for the other direction too.
