I would love to see more detailed information on using the ZAPI controllers to obtain regen. It would be helpful to have 'current state of development' dated so that readers can tell when they should check back for developments.
It would be very interesting to see what the recommended schematic looks like so it can be compared to traction-only. This would also lead to comparing the cost of each method including extra contactors, etc.
One other area that I think could use much more detailed discussion is how much regen one actually gets back into the traction pack. Is it variable amps depending on brake pedl position, or an external trigger switch, or just 'some' fixed amount of braking based on what the batteries can suck up?