wight states in the OP: "My 22k R1 replaces the 19.1k R1 due to the change in how the divider hooks up to B+. 22k is not guaranteed to be perfect, but it’s close enough for me and for now".
It was supposed to compensate for the design change in order to keep the LVP values the same (130 and 120), but I usually use lower values anyway. wight's and C_K's board all had the design change - changed from the original Nanjg, and the original BLF DD driver (https://budgetlightforum.com/t/-/27210). On the Nanjg and original BLF DD, the Batt+ came after the diode, while on the new designs, it's direct from Batt+. The diode has a voltage drop across it, so maybe the theory was it would be more reliable without the diode? This goes back a while. I thought at the time, there was a good reason for the change.
No idea it effected OTC though -- if the 19.1K is better on this exact board design for OTC, I'm thinking it can be used, just that we would have to come up with different values to use for LVP, as long as it stays in range of course.
Ahhh - wight or C_K would know this stuff cold (both MIA), RMM would also probably know. There are a few others around knowledgeable on issues like this.
The only purpose for the 4.7K and 19.1/22K resistors is LVP, so these can be changed to anything as long as LVP can be made to work.
Sorry, made lots of edits on this post...