The layout of components is depicted below. In place of the 12 batteries pictured though I'll have 30 (3.2V each).
The big silver box in the top picture is an old PMC transistor controller from my first EV: the rebuilt Jet Electra - which it pushed around for 4 1/2 years. The switching frequency is only 4kHz so it's audible and makes AM radio interference that sounds like a Harley Davidson. I inspected the insides and it still looks very clean though I may replace the electrolytic caps as cheap insurance in case they're dried out.
