First I'd like to join Mark in thanking you for your service to our country. [sm=thumbup.gif]

Your engine is new and should not be expected to idle at it's lowest speeds yet, not until a few tanks have been run through it and maybe more. But you should be able to get a reliable idle low enought to get the job done. Your idle is probably too rich, many mfg set them that way to prevent accidental lean burns when new. An experienced tuner can help you get this straighened out. Since you have a trainer I'm assuming you are new to all of this and STRONGLY suggest that you get involved with a local club and an instructor there before going much/any further. It will save you time and money in the long run and instruction is free at 99% of the clubs in the US. Welcome home and to RC flying and RCU. Have a great time.