RE: How hard to draw against the Wall...
A 1 cam seems to shoot better and more consistant if pulled hard against the wall.It will shoot slightly different if shot from the edge of the wall than it does from hard against the wall.Pulling hard is the easiest to repeat.
It is also easier to use backtension this way but can be done out of a valley also.Look at all the round wheel shooters that shoot indoor,they use backtension and shoot out of a valley.