I've been doing some researching and considering options on an upcoming AC15 build. I find Vox designs and schematics intimidating - very unlike the Fenders and Marshalls I have built in the past. And AC15's seem to come in many flavors and types. I was hoping to find a number of AC15 build threads here but have found few to steal from. As a baseline, I'm considering using the AC15HTVH schematic. This handwired reissue from a few years back has both an EF86 and a Top Boost channel and no reverb or trem. I want to build it as a head to save weight and space. I have a Ceriatone DC30 clone and really like the EF86 channel. Am I missing out by not having the standard non-Top Boost channel (12ax7 based)? The HTVH has a bass shift and a two position bright switch on the EF86 channel. The bass shift basically allows you to change from a 100nf coupling cap to a 1nf which I'd guess would pull a lot of the lows out. The bright switch allows the choice of no bright cap or a 200pf or 270pf cap. I'm considering replacing all of this with a 6 position rotary tone control like a Trinity TC15 or Matchless DC30 instead. Power supply filtering options seem to be all over the map by different builders. The Vox schematic shows 2x 22uf and 4x 10uf caps with a choke. Others are using various combinations of 40, 33, 22 or 16 uf caps. I prefer more robust front end filtering to make sure the amp has some grunt, so I'm planning on a 33/33 cap can and 4x 10uf caps. I might switch those to 16's. I did buy a choke. Another choice I've been pondering is the selection of cathode bias cap and resistor. A 130 ohm resistor (5 or 10 watt) seems to be the consensus but cap sizes are all over the place from 22uf all the way up to 220uf. The Vox schematic calls out a 47uf. What are the implications of different size caps? Sorry - I'm used to fixed bias amps. Feedback appreciated - I'm out of my comfort zone in Vox land.