I know I'm joining in late to this thread. I bought a new JD-100 from VeraStarr 4 months ago with a mini mod and couldn't be happier. Great advice from these guys, break in is easily 100 hours. Muralman1, I agree, the Sylvania black plates are hard to find, I finally bought the Sylvania Gold 5751 trip mica gray plates a couple months ago and noticed a general increase in openness over my stock 12ax7eh electro-marmonics, I just don't know what I'm missing over the Sylvania black plates. Any comments are appreciated.