I bet if every one of you guys used the power rack in the manner i described every one of you will improve in both size and strength more than you could ever imagine. irregardless of what your method is currently drop it and try this.
however do this only once per week and no other chest exercise push ups or any thing but stretching those muscle per week, or risk overload. it really works that well, think about it. By starting at the bottom position in the manner i described it recruits all of your muscle fibers to do their job. but in doing so it taxes the hell out of them so that you really need a full week to recover. Chest and back same day do your back first to warm and stretch the chest and shoulders etc.
Try this log your efforts into a journal and be amazed. i have nothing to sell here, just giving my personal experience of doing so as well as watching it work for others i have shown.