Working on my third build this week and I have a few questions for anyone who has built a 6g3: Should I add power tube screen resistors? How about power tube grid stoppers? I added a standby switch because I had another on hand, good idea or waste of parts? The 290BX has 330/330 HV. Given ~122v wall voltage and the higher voltage from the PT, am I going to need zeners to drop voltage? I wanted to add ta SS rectifier switch but I'm sure the voltage will be way too high. Please someone check my adjustable bias. I only had a 10K bias pot, but I think that's what is in the Down Brownie. Their first resistor appears to be 100K so I did that and I used 22K on the pot. Not sure if this will get the range of adjustment where I need it. I'm far from having a full understanding of amp theory. I'm more of a paint-by-numbers guy. Here's a few pics, I'll post more soon. It's a mashup of the Down Brownie and the mojotone/weber kits. Primarily used the Mojotone layout but stuck the filter caps on the board. Mainly because I didn't want to build a doghouse and I can make my chassis as long as I want. I added Rob's lead channel mod, switched NFB, multi tap OT. I'll probably add a MV when I decide which one to use. I realized on Thursday that I don't have enough jacks and I only have linear taper 1M pots. I ordered them but they won't get here until Tuesday. Unfortunately I have to head to Atlanta for the week so I won't get to finish until next weekend. I'll get as far as I can today though. Only a few more things I can do without those items.