I don't know about Kovacs doing those presses, but I can't see it being impossible for someone else to do it. There are plenty of strong benchers who put up 200 lb dumbells for reps but only max say 550 lbs. Other guys like Scott Mendleson who bench 715 raw maybe more now, surely can put up alot with the dumbells. Supposedly Ronnie Coleman puts up 250s so if he can do it so can Mendy and probably even more weight.