@illitirit: Thanks for the video. Your HHKB has an exquisite sound. The combination of Silencing Rings and a careful lube job seems to work best for damping unwanted noise and bringing out the thock sound of the board. So far, I have gotten my best results using Superlube 51010 oil, but I would also like to try Krytox oil if I can determine just the right viscosity.
@derb2k2: I had a similar experience with the FC660C. I enjoyed the solidity, but I gave it away because of the layout and form factor. I enjoy 60% and TKL, but I haven't been able to warm up to any board in the twilight zone between 60% and TKL.