I tryed the 6100's[&o] I lost signal alot and eneded up with a lawn dart. I wrote spektrum and they said these are designed for slow flying electric aircraft, Mainly Heli's. I switched to the Ar6200 (like $69.00 shipped on Ebay) just wrap em up with foam and they will live, I've had a couple of good mid airs and I'm still good.
Dont waste your time with the 6100's. But if you do I have 2 I'll sell ya
http://www.spektrumrc.com/Search/Def...rchTerm=Ar6200
just my 2 cents.