Hello,I was wondering if anyone can help me.I was thinking of buying the nova p5xl for my truggy for next season.I was reading the info on the motor and novarossi recommends no more than 25% nitro my question is it safe to use 30% percent byrons or just get 25% byrons also what pipes do you guys recommend the track i race at is pretty big but it is tight and twisty no real long straight,s thank,s Jack