I got the email too Joe, I'm going to measure the stall current tomorrow on my 8 BPRC steamers and a WBB E7 (2 motors) and see what I get.
Im not concerned with the steamers as much as I am about the 2-motored diesels, which all of mine are except my 3rd Rail E7.
The board is 28x59mm and should fit in most O-scale engines, but the 2amp max will kill it before it gets off the ground I'm afraid. Will know once the stall tests are done.
Increasing the boards current rating will also increase the size and the cost IMO, but if all we need is a board and the free App then that's going to be cool.
Of course to go BPRC you'll also need a battery, on/off/charging jack, a charger, an and iPad or something similar. For sound, not sure. Maybe a Bluetooth/wifi speaker with enough power to overcome the noise of the trains and track, along with the sounds themselves. All I would want is steam chuff/diesel rumble, bell/horn, and whistle.
Then there's the lights, but LEDs are only a few bucks for a couple of lights.
