how's your setup? If you have a good arch and your shoulder blades are tucked and jammed into the bench then I would think it would be really hard to pop off the bench. Also remember even if your going as fast as you can you want to be able to control it. You might think about integrating...
I can see your issue with the shirt. That's basically everyone's problem when it comes to shirted bench, is training the lockout. From the sounds of it, your losing most if not all support from the shirt by having it raised so high on your chest. On issues with your arch and the shirt, do you...
Just a few things I noticed:
I would drop the leg curls. I don't think these really help at all. I would try Glute Ham Raises, Romanian Dead lifts, stiff legged deadlifts, pullthroughs, Hack Squats, Power squats or even good-morning variations as alternatives to the curls. I think you'll get...
It makes sense about the older bench shirts. If you don't mind me asking which katana are you using? The S/S model (90 degree arms) or the A/S model (45 degreeish arms)? Also do you bench with a big arch or are you more of a flat bencher?
I'm currently using a hand me down fury with a open...
I'm having a hard time believing you are able to get the bar down to your chest in a shirt with that weight. It seems like you're benching around the shirt instead of using the shirt. I have to get up to around 315 to get the bar down and even then I'm rowing the weight down to my chest. Just...