Like captin said very good and complete report. I had the detonation problem with my ST40 on gas/glow. It does not have any detonation noise on E85 even with 15% nitro. I changed and started mixing some glow fuel in with my E85 mainly because I have cases of it and want to use it up. I could fly about 15 to 18 minutes on a tank of glow fuel before running out before and now with E85 mix I can fly 20 minutes and still have fuel in the tank. I am guessing about 5 minutes more left in the tank. Haven't dead sticked it yet so I don't have an exact number before empty. When I first started mixing E85 and adding nitro and oil I didn't think I would be getting much cost savings. After seeing that my fuel lasts longer I may get the savings I was looking for.