RE: The MOST powerful .21 engine?
OK, I still love my P7-R but am just waitng for winter to run it again (it's suffered from losing 2 fins as they all seem to have done), Accell wise it leaves the V spec behind, but the way in which the power is laid down so smoothly from the V is just perfect for my style, I just dont have to brake, I can run right up to a bend, lift off a bit, cruise round and punch the exit, so smooth, so reliable and so easy to start.
I would take up Russ' deal but I bet they're series 2 models with the dodgy cranks.