Don't get mad but you'll thank me for this.Please.Please Please switch to FASST system or one like it .I'm of course refering to spread spectrum, while not perfect it's absolutely the best defense we as modelers have going for us.I fly on a industrial park site and everything immaginable is up there.In closing i had problems with everyone of my planes ALL gassers and nearly lost a couple in close encounters.Forget all that worry about where you mount switches, battery packs and recievers etc, that system does'nt seem to care.Later