Oh, yessir! Why? Because on a "normal" cablegaurd, the slide runs forward and back during the draw cycle and allows freedom of movement of the cables in relation to the draw, and with the stationary roller guide it does not. The result? About 9 lbs more prestress on the limbs.(sometimes less, sometimes more, depending upon drawlength setup and cam size) Test it yourself---weigh your bow with the cables on the roller guide, then weigh it with the cables off which allows them freedom of movement. The extra poundage comes because the roller guide is stationary, so something has to give and in this case it is the limbtips moving an extra distance to compensate for the stationary roller. Too restrictive IMO, and I don't like the idea of running an extra 9lbs of prestress on any bow, thanks. Just my own thoughts, Pinwheel 12