my gearbox [ god bless its oil & mainshaft ] is not able to cope with a full map or session on the rollers , does anyone know where i can get a STANDARD g box thats not silly money , all it has to do is last a few blasts on the rollers ,then after that i can get a real one from you all know where

ive got to get it mapped cos everytime some complete bell end wants to rag it away i have no choice but to sit there helplesly watching them THINK they beat me , LOL

its quite sad really

any tips plz people ?