RE: Hoyt Vectrix=Pain to tune?
John,
Shoot it for a week and let the strings/cables settle in like they suggested. Any changes made to timing, etc will change after the strings are settled, so might as well get them settled and then worry about it. Put a good 200 shots through it and then start to worry about this stuff.
Once this is done, if I were you I would recommend starting to work with Mark now if you want to get coached and the first thing he will do is get that tuned and fitting you perfect. This is the time of year to tear your form apart, etcnow that season is over. Mark is the most technical person there and probably the best guy in the area when it comes to C/P/S or Cam and 1/2 systems and he can help get this sorted out and making sure it fits you perfect. If you need his contact info, let me know and I will pass it on.
Spine isn't the problem either, that would cause left or right tears, not high/low tears. Your problem lies in rest position, timing, tiller, etc.