Hi guys,
Can't make up my mind between a blast v20 or v21? I had a P5 XLT and enjoyed the power on that one. What I did not like was replaceing the bearings after 2 galons.
I run this in a serpent buggy.

It's weird, there are pretty much no threads or reviews about these engines?
Also how do these V20 and v21 (stock not clocked) react to the Nitro-Mizer insert? and how do they compare in performance with a p5?

Thanks