anyone know anything about this engine? i saw it in a mag wher they had it in a jammin x1cr and they said it was blowing buy most other buggys down the straghits.the motor is under 300.00 thru ace hobby and just can't decide on what motor to buy for my new k3.I'm looking at vspec,421b,p5 or rb's ws72 or the s7. :shrug: