We are all fighting the same problem. I have the XT also. I have been tuning and retuning it since April. What I found out is that you can paper tune it and you can bare shaft tune it and, at least on mine, neither are the same as broadhead tuning on the XT. This has been driving me crazy. I am going elk hunting in about 28 hours. I had it perfect last week. I could hit a grapefruit with a broadhead up to 40 yards. I took it to the shop to just check it on paper tuning and I ended up changing everything. It would hit perfect bullet holes in paper, but the broadheads were a foot off. I am almost perfect now, I think. I shoot the WB also. I had to pull the arrow rest all the way into the riser. The only problem is if you are too close you will hit your blades of the broadhead on the riser when you draw. I don't know the exact centershot of mine today, but I started at 13/16 and probably moved it to 11/16. I also had to drop my knock point to almost exactly square. In my opinion, if you are going to hunt with it, broadhead tune it.