I had simular problem, I will explain. My Cat was good straight out the box, no problems, then I changed a few bits during routine maintanance, then it broke almost every run, I did spurs, diffs came un done, wishbones, and even had trouble with the receiver, I worked through it, fixed all the broken bits, and it has been good since,
So don't give up too quickly, and once you have worked all the bugs out I think you will really like the Cat
