Hi Neil, did you purchase one?
I am almost certain the 12" MW12B motor is sensored, coming from this post in the golden motor forums
"Oh, and the GM controllers are ofcourse PWM, and the hall sensors inside the motors works at 5V, and delivers 0V to just below 5V out... "
"Phases are 120 degrees."
here is the link:http://goldenmotor.com/SMF/index.php?to ... 2#msg20632
I've been looking at them for my scooter design (been looking at the 6" one and particularly the 8" Hub24A, which doesn't have any price...) and just emailed them regarding the thinner models.
apparently their email communication isn't great though, so I don't know how helpful they'll be...
all going well I'll have two of the thin 8 inch motors soon, I'll post here about them seeing no one seems to have really tested them yet.