the problem with me is i have this popping pain in my shoulder when i do flies. And once it pops my arms kind of give out. i may be able to get away with like a set if i warm up my shoulders for a long time but after that i'm done for. i had talked to a few people at my gym including trainers but nobody really knows. the best guess was a tendon rolling over a part of the shoulder or something like that. i most definitely need width in the chest though and all my chest lift i have a wide ass grip already cause i like it better. the only thing i can really do for flies is machines and we just have the seat straight up so it's hitting the same muscles that flat bench would. any help or suggestions?