joncrane, i agree the the real fly is easier to cheat on, but the peck deck weight stack has zero relation to the db flys. I can do like 3-4 times more weight on the peck deck than i can on db flys. But hell, it not the weight, it the consistency. So long as i use the same machine and see progress i am happy. Afterall, progress is progress.
Also, i used to get a lot of stress in the elbow from peck deck, cause i was doing it wrong. I use to let my elbows drop a bit. But now i keep my elbows in the same line as my shoulders and wrists and there is no pain, except that in the chest [where is suppose to be].
-Fatty