how much do you think he could have benched with the proper "support gear"?
i say around 900
Very difficult to estimate as the shirts (we'd be talking multi-ply, of course) help to wildly varying amounts for each lifter who trains with them. Certainly with proper training in a well-fit one Kaz would have pressed over nine, yes.
Kennelly has the biggest shirted press but wasn't as strong a raw presser as Mendelson, who still holds the record at 715 (despite that lift having no pause, ha, ha). I believe Kaz pressed 660 (raw) and hit six reps with 600 (?). There's that dude on YouTube who is shown pressing six for six, and this (as Kaz apparently did, as well) represents just about the strongest that has been seen on the lift.
FREAK pressing strength.
I believe Kaz could have bested Mendelson's raw record if he hadn't gotten injured. What he could have achieved with the right multi-ply shirt, and proper training using it, is a major guess, at best.
But definitely nine, yeah.