Castle has been doing sensored since at least 2010 so its not like its all new to them. They just don't do sensored motors which I would think would change if they want to keep up with the rest of the manufacturers. Well dang I wasn't sure how the firmware was on the new ones but I seen that was two things that no one asked about yet. I had one motor that cogged until i overrode the power setting it was power hungry apparently.