The BMS boards for these Thundersky cells are now built and
programmed. I found a software bug that needs some more exploration.
The software is easy to tweak so it can be dialed in to any
differences between brands of Lithium cells and/or drivetrain/charger
setups. The only hold up is that some parts for the master board have
not arrived nor has the LCD. Testing as a complete system will
hopefully happen by the end of the week.

This system seems like it could be made to work with lead acid. The
3.5″ LCD gives a lot of info.