the answer is relative to the cam style you are shooting. like said a one cam has a solid back wall and most two cams except for the more recent models have mushy back walls. i am a two cam guy and just love them for their adjustablity and tunablity but my next two cam will have solid walls. i like the concept of the solid wall and being in the same exact anchor everytime but have also read that you had better pull into them the same everytime and pull evenly against them everytime or accuracy suffers.....