Demik was nice enough to let me borrow his lubed and silenced HHKB for a test drive as I considered having the same work done on mine.
I HATE LUBED AND SILENCED HHKBs. Not a popular opinion, but I found the lubed/silenced HHKB lacked the very noise characteristics I like about the HHKB, the keys felt mushy, and the reduced key travel was noticeable. My suggestion would be to try such a board before inflicting this kind of mod on it unless you enjoy the prospect of eternal disappointment.