I dropped the pup, then bound the two B50's together on a DX8 radio & drove them up the incline simultaneously
https://www.youtube.com/watch?v=uJlBg7F8-Go&lc
I learned something from this video... 4 brushed motors on one esc, like a front loader or tractor, works fine; but 6 motors on one esc in the ADT, kinda wonky!
I always thought since the 1st run of the newer B50 that it didn't seem to pull the incline quite right; and now without the pup I see why. Time for some rewiring.