Are there any recievers other than the 3 specified by Hitec that can be used with the Aurora 9 (2.4Gig), primarily smaller ones for smaller aircraft such as a combat wing or ARF Foamie jets etc. I am a little hestant to expose the Hitec recievers to the rigours of combat and dont need 6-9 chanels (Optima 6, 7, 9)