well, that's not the case. sorry, but you'll find far fewer people who use negatives that you will guys who use boards, lockouts, chains, or bands. the injury potential on negatives is just mindblowing. and after looking at the training protocols of the top lifters in monster muscle online, elite, t-mag, or wherever else they'll put things, i noticed a distinct lack of negatives in them.
they may have a use, but their usefulness is not beyond other lifts that could be used instead, and the risks outweigh the rather meager benefits they do offer.
word.
matt, if you really want to get a feeling for more weight try the old faithful static holds (strong range) and partial reps in the power rack. you should also be doing statics on your weak point.
doing excess reps with a comfortable weight ie 225 for 30 - 40 is retarded. id don't understand these guys who say they want to beat what nasser or ronnie did. i mean why

you do know they are actually bbers don't you? doing 70 partial super quick reps with 225 means about as much to ronnie as a warmup and has about the same effect on his physiology.
why don't you try pushup reps with a weight on your back or something. that would be a much greater test of endurance with far greater results - abs, chest, tris, back, etc - than lying back on a bench and doing 40 partial piston like reps.
in any case, you take your drol and do your reps, you get to 80reps and so what? is ANYONE going to compare you to ronnie? the best reaction you'd get would be laughter at your monster obsession with a guy way out of your league, but most people would just yawn and move away.
i assume you'll be doing your 800lb squats and 430lb rows like ronnie too right?
maybe it's time you got over your obsession with pro bbers and got a life of your own. you know, just for shits and giggles.