You're gonna love it! As for the tubes, I've tried to roll both 6922 and 6N6P. The stock are really really good. But if you venture into tube rolling on the pre-tubes, I would recommend to try to find some Russian 6H23p(-EB) from pre 80's (around 50$ for matched pair). Excellent tube for the price.
6/1/15 at 1:05am