46u i have a question for you

O'donel is ur brand of choice correct? i too think they are good. but i have noticed they have 2 blends right? sport and racing? or is it r2r and race lends

ive read both but cannot find a difference

another thing whats ur opposititon on switching nitro %'s

example i ue 20% traxxas in my 4-tec but would like to go to 33%. would u think a simple tuning could adjust it?