I got about $3000 in this. I hit 55 mph running about 120-140 amps thru it for a few seconds, then I backed off. I don't need that kind of speed, so I have it programmed to only hit 90 amps max, which still gets me to around 45 mph..and that's plenty. I'm running 72 volt - 28.4 Ah li-ion battery .
I went with a LYEN sensorless controller....I don't like having to use the hall wires .
So once again, I do not think a stealth bomber is worth the $7000- $11, 000 price tag.