Attempted a bench press variation today with floor presses. Didn't go so well. I thought I'd be able to slide under the bar to assume pressing position with 45 lb plates on each end, but I could only fit by raising it while I lay under. That definitely wouldn't work with 315 lbs. As I was doing the initial set of 135, the pain in my shoulder felt worse than ever -- and this wasn't even as full a ROM as bench press. It still didn't affect my performance, and I could have worked through it if I wanted to, but I decided to not press my luck with this. I just did bodybuilding stuff instead, supersetting biceps and triceps (exercises that would not aggravate my shoulder). Actually, I would say that today was the most painful workout I've ever experienced because of the blood rush. I have stretch-marks on my biceps from doing super-sets today.
I also did the entire rack of weight for tricep pushdowns for 10 reps. I hate machines. It wasn't all fooling around, though. I tried out elbow-extensions, a tricep movement specifically prescribed for powerlifters looking to build up that area.