I agree with you Michael.

One person mentioned powder, I used powder in my past career on a lisle camera, amazing stuff, but most of the work I was doing there was reduction of image size or SA only, not enlarging. I would think that powder would be troublesome with a big magnification.

Interesting thread, I was hoping that it would not be conclusively proven that better glass would give better prints, I would have a lot of explaining and reprinting.