We're not giving him powerlifting advice. As a matter of fact, at the top of the thread, I prefaced my statements by reminding everyone that he is training for bodybuilding.
If he's not trying to be a powerlifter, why is he asking about bench competitions and leverage, and finding his weak link to lift more weight? A few of us have asked why his concern isn't on his chest, or some other hypertrophy specific issue WRT his bench. No answer. Someone who wants to do a bench comp, bench 500 pounds, and remain injury free, all while building more mass, is not going to get there benching with that form. Period. If that form worked, he would've been at 500 years ago. I don't mean that in a pointed way, I mean it literally. 7 years is a long ass time to still be in that range, even with a single ply poly. There is obviously a weakness, and he knows it, or he wouldn't be asking about it.
We have said repeatedly that his form is the issue. Someone told him the circular motion at the bottom (and whatever is causing that circular motion) is part of the problem and he replied with a rather "you don't know what you're talking about:"
I'm not really concerned with rather or not the circular motion is good or bad. So far it's been good to me. I'm getting stronger, chest is growing, and I'm remaining injury free. I'd just like to find the weak link and begin working on that.
Basically he said: I don't care about the circular motion that may be my weak link, I just want to find my weak link.
WRT the elbow tucking, how can you NOT tuck your elbows? Your two biggest issues here are the circular thing at the bottom, which is probably lats, and this elbow thing. If you can stand with your arms against your body and bend them to 90 degrees, then you can do it laying down too. This form critique was ruled out in post #4.
So what are we supposed to tell you? The obligatory, "Good work man! Keep the numbers coming! Stay strong!"
Bottom line, IMO, if you want to be a body builder start asking about your chest development and use less weight. If you want to bench 500, do a bench comp, etc...then take the quality advice and get better form.