I work for a company that makes motion control products. I was wondering if anyone needs a DC motor power amplifier for driving motors at 100A continuous current at up to 30V. This "amplifier" would accept motor control commands from a serial port connection, an R/C receiver output, or from an H-Bridge output for driving a much smaller motor. Power is supplied by an external high-power source connection (12V car batteries, etc). I was thinking we should add something like this to our existing product line if there is enough interest. I know I am interested - is anyone else? The device would probably be in the mid $100 range. No fans or moving parts, probably around 4"X3"X2" in size.