You are fine on the bigger hole on the WB. Better big than too tight. I shoot a large hole with carbons, works great. Sounds like your arrow spine is probably ok too. My first step would be to shoot through paper and see what kind of tears you are getting. Try a fp tipped shaft first, and try to be consistent on your form. Don't grab the bow, etc. That will tell you what your arrow is doing. I usually shoot about 6-8 ft away at first, and once I get a good tear...back a little further also to see what it is doing - maybe 12 ft. My guess is you need to move your rest left or right a tad (make very small adjustments when you do). Once you have a "good" tear on paper (doesn't necc have to be perfect), shoot at 20yds and see how it looks. You may need to adjust your site. Also, shoot fp's and bh's at 20yds and see where they hit. Then broadhead tune and you should be good to go.


Here is a link to Eastons bow tuning guide. Great stuff in there.

http://www.eastonarchery.com/pdf/tuning_guide.pdf


Here is a link to broadhead tuning if you don't know how.

http://www.archerytalk.com/vb/showthread.php?t=539460



Hope this helps.