When is a "problem"....
...not a problem.
OK, some will disagree with what I am going to post, but it represents my experience accurately.
I got involved in this thread at perhaps the wrong time, but when I noticed the discussion about the Teknatool pen jaws not aligning, I checked mine and they didn't either. I have to confess that I had not at that time tried to drill with them because my pen jaws were new and I had not yet needed to drill a blank.
I mentioned in this forum that I contacted Teknatool and they responded right away with a new set of Pen Jaws. I posted that they were the had the same issue. I also checked to make sure the jaws were orthogonal when they were not attached to the G3. They were.
That led me to believe that the surface they mounted on on the G3 was either not flat and/or parallel. I contacted Teknatool, and they sent me another G3 and another set of Pen Jaws. I mounted the pen jaws on the new G3 and the result was the same; they did not come together in a parallel manner.
OK, I said to myself, why not FINALLY mount my old G3 and my original Pen Jaws and see how they perform. DUHH! You know, the proof of the pudding, etc.
I cut a walnut blank to the size needed for a Slimline pen and mounted it on my lathe.
The hole was PERFECT in every way. Round, not oblong; centered at both ends. Just PERFECT. I did not have to clamp it so tight as to deform the walnut. There were no marks on the blank at all. I did notice that the blank will not go all of the way into the jaws, since it hits the inside screw head. Didn't seem to matter, but I thought it might go down a bit more.
I called Andrew at Teknatool and explained both my findings and my embarrassment at not testing the combination before I called. He and his sales person were both very understanding. I asked if they would provide a return number so I could send the G3, and two sets of Pen Jaws they had sent me (at no charge) back. These are heavy, and although I would have paid for the return postage, I wondered if they would authorize a return at their expense. They said I should keep them with their best wishes. Andrew reminded me that they were guaranteed for 5 years and if I had any problems, to contact them and they would be happy to help in any way.
Teknatool has a customer for life. Absolutely the best customer service I have ever experienced.