It seems the new ones ship on the cold side ~17-18ma 33% and mine was recently set from 45% to ~65% maybe a hair under. I did play with a few in between settings because @ilikehats was kind enough to adjust it for me while we figured out which bias gave the best stank face. I also changed the preamp tubes from jj12ax7’s to some higher gain 12ax7B’s. There’s an amalgamation of different tubes in there for my own personal preferences but v1/v2 adjustments where I starter were enough to have a perceivable impact for me. it’s not like it sounded bad, but it was one of those things where I just knew there was a bit more in there that I personally wanted. Not sure if the 50w is the same bias wise. I traded an SL67 MKI for the Helios 100 and it’s been everything I was hoping for out of a plexi/jcm800-ish amp. It did take me a while to understand the eq but was worth it. I enjoy tweaking tubes though. At the end of the day it just made me want to buy more Bogners.
This is much more than you asked for but hope it helps!