Lol, I agree that it looks a little jenky, but the set-up works well for me. The rack itself can support the weight and I'm experienced with bailing under a heavy squat load when necessary like this
http://www.youtube.com/watch?v=ve81mEnf2oQ (I have a set of bumpers on the bar and they're the largest diameter plate so they should absorb the brunt of any fall). Even when at the gym, I squatted outside of typical squat rack supports (and consider that I haven't failed on a set of squats in 4ish years) so this isn't atypical. I don't have $400 to spend - I spent $100 on this heavy duty squat rack and that's all I had. However, this is something I keep in mind and is the reason I'm not doing a 1RM (3RM only at home). I agree I'm struggling with the last set, but that was due to a slight weight shift, which is not typical. I shifted forward, which I've never done before. I knew when to call it though at rep 2. It was a max effort so things are gonna go slow. I appreciate the input. Considering this, I could build a safety by using something like jerk boxes. Those are relatively inexpensive and I'd really only need the one set because the depth of my squat in unchanged. Or practice dumping it more from a back squat position. Either way, thanks man.