[Batfish]

It may be a little bit of a thread hijacking here, but I've often wondered if it's possible to put together a sensorless brushless setup that meets all ROAR rules requirements. Maybe a pre-configured system like the Mtroniks would work, but I don't think they are considered rebuildable since they have a pressed end bell.
Either way, it's something I've wondered since ROAR first added these rules last year and it would be nice to find a way to satisfy these requirements with a sensorless system.