Terry, it looks like your W/T ratio on the preform is about 4/1 when you set up to flute. Is that about right? I did a little fluting with a Solberger a few years ago and then got away from it. The last few flutes I did were done with indirect percussion, but even that has been a while now.
I see that your fluting nipple is further to the flute side than mine were, and the angle of the bit is much closer to parallel with the point than mine were. Of course indirect percussion involves a whole different set of angles.
I love the flaking on your Georgetown preform development. That is also some of the prettiest Georgetown I have ever seen.
WA