Yes, I did. I often open up the handles, because I prefer larger knots. I have a system that works quite well--I simply use my dremel with a sanding drum, take my time, and open up the holes. Then I flat sand the top of the hole and reshape it, then use wet/dry sandpaper in varying grits to get the opening to look right.
I have done a few with TGN's finest, and several in fans. I have used all of the TGN knots. Honestly, I like a variety in my restores. Believe it or not, the pures are really nice, and the black badgers as well--lots of backbone and scritch. My favorites are the super soft silvertips and finest, though.