[MetalMan]

Like you said, what we are doing is very experimental. Sensorless technology is still rather new. We are pushing the limits of it by using these ESCs where we do. In other industries, startup torque isn't usually an issue, since the motors would be used for constant spinning.

If you want stable technology, then you'd have to look toward sensored ESCs. Sensored ESCs are not nearly as technologically advanced as sensorless (since they use a simple hall effect sensor to tell the ESC where the rotor is). Sensorless is definitely a better technology, but it needs to have "bugs" worked out to be as reliable as we wish it would be.