We have reviews on the site for the hand made versions. I am testing the Production model of the MG66 and i have to say that Go have done an amazing job ! i am totally wrapped with it. The hand made version was getting about 12 to 13 mins in buggy tank time. So we envisage the average user should achieve 11 mins tank time. But in saying that tank time has so many variables thats outside the engine its self. two people with the exact set up and engine can achieve different tank times from driving style. So tank time is really up to the end user. EG one of our team drivers was getting 10 mins no problem , when we went into some tune training he ended up getting 14 mins in his truggy. thats a big leap and it was down to tuning experience and fuel choice.

hope this helps