After a decent beta run, we are now shipping the conversion kits based around the Nine Continent hub motor and a Crystalyte sensorless 20A controller. The main lesson we have learned is that because of the higher torque output and the lack of an extended keyway on the axle, these hub motors are more prone to axle spinout than the Crystalyte 400 series. So extra precaution during installation is required, and we will have matching torque arms to offer with the kits in the near future.