Hey thanks for the input and fast reply.. oh yes, off topic question (sorry don't wanna start a new post though).. I over-heated my engine today (I was tuning and got a little over-zealous, not checking temps.. nitro NOOB! Plus my oily fuel didn't help much I thought it was rich!) - is there anything in particular I should do for it? I really don't care that much about my current engine, as I'm replacing it in a few weeks with an os 18, but I still wanna keep it in good shape for a back-up engine. Temps were around 310+ I believe. I let it cool down to about 200F then started it again... took a bit to get it started for some reason (was a bit worried) but that was probably because I over-richened it. It was running fine for about 25 mins after words, temps 240 MAX (and thats going through leaves and over rocks and stuff).