WhEW thats 1 hot motor at a very steep price. Th os21 tm is like 275. Look at teh picco/ofna.21 or a wasp .21

Here is an expensive little motor. I have one of these in a .15 at half the price.
http://www.peakmotors.com/Nitro+Engi...blo+REV+CRF+12

Look at the Diablo .28. Its the same size as a .21 and will rev like one with almost 3hp. Now thats a motor.