RE: Draw Stop [?]
I can't speak for all of the single cams out there but if you remove the draw stop from the Hoyt Versacam then the bow draws past its highest advertised draw length setting by almost a full inch. So a Versacam #3 which goes from roughly 27-31 inches would actually draw to 32 and the back wall wouldn't be quite as solid though it is still "workable" in my opinion.
The original Redline did not have a draw stop and yet still possessed a solid backwall. The downside to this was that there needed to be a different size Redline cam for every inch of draw length. Same thing goes for the original Mathews Maxcam and the Straightline Maxcam if I am not mistaken.