[Joe Ross]

The reason that Innovation FIRST had to design the victor speed controllers was that there weren’t any cheap high current speed controllers available. Like sanddrag pointed out, you can get ones similar in price, but not cheaper.

And, both Ken and velocipenguin are correct. The victor 883's are only designed for 30 amps continuous. However, they can handle peak currents in the hundreds of amps. They also have a 10% deadband, which doesn't really matter for drive trains, but can matter for arms. The 884's handle 40 amps continuous (which is why they are now required), but also only have a 2 or 3% deadband.