You are right the EZ RUN system is not sensored however it does not suffer with cogging like un sensored systems of the past. After reading the DMS post on the losi motors being BRCA legal and a resonable price. I thought I will try my sensored Reedy motor on my EZ RUN speedo. Only tried on the bench but it worked fine suprisingly. I will try it for real on the frist outdoors at Southport (05/04). If it works fine it should mean you could run pretty much any brushless motor with the speedo up to about 6.5 turn.
MTCEXHAUSTS.CO.UK