the S-1 will not work with the spotter arms, you need to close it in like the S-2. If you are want to do rack work like bands, pin pulls etc then making the investment into the R-3 would be the way. The R-3 is the work horse of many garages
Yeah I've never squatted in a rack and don't feel the need. I feel like I'd always be able to bail. Plus I'd worry about bending my bar doing rack pulls. But I do like to bench and I hate not being able to go heavy.
I thought I saw someone in here w/ spotter arms on an S1. I wonder why you need to go S2 for the arms to work?