My Supertec eats the things so I went back to the old limbsavers. They have not moved at all on the Trykon. But I saw pictures in Petersons of a Trykon with the Alpha Shoxs and the old style of limbsavers installed. I did that too.
I wasn't having much of a problem, but I still prefer the old style.
As for the spiral cams, I don't have a problem with grouping. It's all in good tuning and shooting form. If you get sloppy with either, it doesn't shoot well-just like any other bow. However, it is not a forgiving setup. The Supertec and Tubotec have 5 3/4 BH, 65% let off and no, none, nada valley. Creep and you're done.