ORIGINAL: buckeye
I would think a .400 spine is a weak arrow out of that bow. I am willing to bet you need 340's. I have ontarget2 on my other computer. If someone doesn't check it for you first I will after I get home from work this evening.
I can't believe you didn't at least try shooting a stiffer arrow before going through all the trouble of switching rests and screwing with your cams [&:]
Or condemning the bow when it may be an arrow issue.