I initially had contact issues with one of my bows. The company did return my e-mail quickly, and offered suggestions. Other suggestions by Jeff B. were also very helpful. I put the Ultra on my Darton Tundra, and it is working very well, no contact, shooting well, and quieter than the rest I took off to try the Ultra. Full containment and no perceptable noise on draw or release. It's hard to beat that.