Originally Posted by
MrWild
how you started your hole. If you just drilled without locating the hole with a center drill, the drilling drill can walk the drill point that far before digging in. Once started, the drill follows the hole path. As I wrote that, two things popped into my head. If the deviance is front to back, the column may have flexed from the stress of the drilling forces. If it's out side to side or a combo of both, it could be you need to tram the head.
Newbees don't realize they need to tune up the mill before they start cutting. Not a problem though, just a bit of experience will fix that. If I were doing a X2, the first thing I'd add is a back support. Are you doing an X2 Freak? Lots of good info in Hoss's threads, and he has a sale at the moment on all the mods in one CD for Zoners.