I did install the 4000g stone last night. First off it was a little hard to put on. Has a soft metal center. Once on I did notice the wobble you mentioned. Not much more than the regular stone which came with the Tormek but still noticeable. The drive rod may have a little bend to it? Anyway, I ran the TT-50 across the stone and it did as you said - put a sharpness on a blade to the nth degree. I may just keep it.
Thanks
Paul
Thanks
Paul