My aim is to write a guide on it, the next step is that I'm going to take the standard charger, gut it and put jumpers on it so you could also have your self a variable positive voltage supply.
One issue I have with it getting smaller is that the heat that is generated by the ICs would be a big issue if I don't plan on heatsinking them. I'll have to make an extra thermal cut out, no need for a micro controller.