YES tom you are right the motor i used was a prince 13.5 & it was a good choice for the day , What motor were you using ?? Had I used my NOVAK with the 13mm rotor would have been harder to drive as it has way more down low & runs on faster (strugled to get it all down on the track anyhow).
NOT to put the prince down it was really very good & would recommend it to any body if they wanted to run lower gear ratio's and rev it out.However the motor will only perform as well as the power supplied to it & as stated previously "I WAS VERY APPY" ,Thanks again Slingshot & Amp it up !!