RE: Draw Stop [?]
Straight arrow,
To answer your first question...not all perimeter weighted style single cams that don't have a draw stop have a "mushy" wall. Hoyt's old Redline cam was far from what I would call mushy.....and the same thing would go for most of the Mathews cams.
As for your second question......I think it would depend on the cam. Some cams are designed to draw into the peg that is machined into the single cam where the cable anchors. On others I am not as certain.
Ofcourse, doing something like this would mean that a new hole would have to be drilled into the cam edge and that would obviously void the bow's warranty and could cause possible damage to the bow and the shooter.