I like to do DB benching for variety. Over the year I've increased the weight to the point where it's difficult to get the weight into position and lie down on the flat bench w/o stretching my shoulder in a way that just doesn't feel good. I'm using 100lbs+ DB's and usually put the dumbells on my knees when sitting on the flat bench and lie down while pushin the dumbells in place by kicking both my knees up.
Any other techniques out there? I find incline DB presses easier because I sit back kick on the incline bench and kick one knee up for one DB and then the other knee for the other DB.
I find this is limiting my ultimate DB benching weight because once I get it up I can do 15+ reps w/100lb DBs, but I don't think I can go any higher w/o risking shoulder injury in initiating the exercise.