First post and a question. I understand the Rev cams are draw length specific. With that in mind, how does one go about identifying the DL of a particular cam vs which model bow it's on? In other words is a 30" DL GT500 cam the same as a 30" XLR cam? I suspect not since the brace height is different for these two bows. Are there number designations on the cams......if so what is the shortest and longest (identification #'s) cams available? If one were to need another set of cams what is the aproximate cost? Thanks for the help.