I didnt mean to leave you hanging,just havent been online in a while because the weather is good and I have enjoying the hell out of my NEMESIS,man,I just love that thing,hold on a second,Im getting emotionalokay,I would recommend,odonnel20%.Thats MY personal favorite,but I have to drive 100 miles to get it,so sometimes I run sidewinder20%.Your fuel may not be the problem,but it is my guess that it is.That stuff may burn fine in HPI or whateverelse,but you cant go off of that.CEN is in a leauge of its own.From what you say here there are no airleaks,and all else is good,and then you say HOMEBREW FUEL[X(],there it is,seems to me you have solved your own problem.I could be wrong,Im just telling you that if it were me ,the first thing I would do is dump that crap and run a top named brand fuel,with a good reputation with 20% nitro.I dont even have that checkvalve setup that everybody does and I have never had overheating issues[:'(]