HI converts! I've been using my 60%gasoline/35% E85/5%Nitro for more than 2 months now and the engine is running very good the engine is a featherlite 25 with a MA 15x8 prop mounted on an Excite 90 and having a ball with it, I cant tell the numbers on rpms because they stole all my equipment about a month ago but luckylly I had a vanguard 6 channel radio stored for a long time, changed batteries bought some high torque servos and I bought a sligthly damaged Ecite 90 for $70.00 (very minor damage, two smashed wing ribs which I glued back togheter and voala ready to fly) but the way the engine sounds and by my own experience I tink I should be getting around the lows 8000, I will measure later as soon as I can buy myself another tachometer, by the way my friend made an insert to convert it to glo out of a NPT bronze T adapter I think thats the kind of thread used in gas connections it goes into the thread very well and then it thightens I think is kind of conic, but it works very fine I'll try to take some pic's as soon as I can and post them here for all to see.
So please give it a try and you wont be dissapointed besides think of all the weight that you'll be saving by trying this configuration.