I will agree that the losi 350 is a great engine for it's price iv tried it and it has great bottom and mid the top is a bit slower but u can't expect to get gold for nothing. I have heard a few friends that have gotten 10 gallons on one an I felt the compression and it was still decent but it was a pro drivers practice engine and he knew how to to tune good. In my first 2 years my engines wouldn't live past 3-4 gallons and then I got a ninja jx and was at ease and then a nova and was even easier, I found matching your engines with the same brand pipe works well like 2050s with ninja and 9901 for the nova made tuning simple. throwing on a 2013 or any jp pipe on a ninja just made tuning near impossible cause ur window was small. I would say stay away from piccos all my picco based mills were finiky and tuff and just wore out fast.