You can calmly tinker with it as much as you want in the air. I do my setups in the air, with my old man standing next to me doing the adjusting while i'm flying. I tell him what i need and he punches it all in.

Get someone you trust and who knows his way around your radio and you can do all the finetuning right in the air. No problem :-)
Regards
Hank

PS: i fly Graupner/JR, but other brands should work just as well