Bhunter32,

I have a 2003 Protec with the Spiral cam system. The spiral cam 1/2 is not as smooth as the regular cam 1/2 but gives extra speed. The feel of this cam is harder than the cam 1/2. The wall is solid. I was going to order the Ultratec but Hoyt's specs in their catalog on draw lengths were incorrect so I went with the Protec. I have put over 1,000 shots through the bow and no problems. My set up is set at 86 lbs, at 32" draw and shooting 560 grain Gold Tips 7595 (with weight tubes and 125 grain head) the bow shoots 287. I will tell you, that on cold mornings and especially now in new Jersey Winter bow season that the spiral cam is hard to break over.
Good luck,

Bmott