Trust me I appreciate all this thought you guys are giving....I guess this jig dose have a 27/64 hole and that is pretty close to dead nuts it's the 1/4" hole that's doing the walking...I'll spend some more time with it and see if I can't get her a little closer.... if I had a super cool drum sander like you guys that would definitely be the easiest way

That jig pictured looks to me needs to have longer vise parts on each side. Any wiggle will be more out of the holding part I would think.

Once tight I have no wiggle at all on mine, I have had no problems with it, if I did I suppose I could shim a little and or add straight pieces to either side to make the vise clamps longer or to make up for a not so perfect block, various solutions, or just go back to Ed's place and get a refund or new one. My drill guides have no slop and are center'd so no bit walking, can't think of a better jig tool. Kopper I hope you get it figured out if not give Ed a call. Don't know who you bought it from if it was purchased from a second party maybe it was damaged some how

How about if you used a forsnter drill bit?

Think that would help with side support on the inside wall of the jig hole?