I will add, sitting with Dave was an insanely cool experience. As others had said his shop is in a bad part of No Ho (N. Hollywood). I walk in and there are box's everywhere from guys who shipped their heads in for mods or work to be done. There were 2 other techs in his shop also working on heads. The guy to my right was working on 2 JJ 100w heads owned by one of the smashing pumpkins guitarist. So the shop is the go to place for amp work in LA.
Seeing Dave with a soldering iron and doing his thing was very cool. At one point he had to get pencil and paper and give himself a visual of what he set out to do -put a new 3 way switch in with 3 different resistors proving the voicing. Through the process he was using jumper clips to allow me to A/B voicings. Some were drastic and clear what I wanted others were less so and harder to choose.
The BE Dlx and nabbed used was a like new 2020 and according to Dave did not have some features in the base circuit that the newest ones have so fixing that was what I meant in this video when I said the 'stock BE tone is altered'.
Lastly, it was a bit awkward when we first plugged it in because Dave switched on the c45 and said 'this has less compression and slightly more gain' I say 'not to my ears'....... he shrugs and we move on. My point is what pretty much everyone on the forums and my other friends who own the BE agree on is the factory voicing is what Dave likes and despite the newer ones being voiced more open, they are still too smooth and compressed. In any case this was an experience of a lifetime and I am very pleased with the outcome tonally speaking!
2nd vid