Hi tim i bought the synthesized corona receiver and it was a swine to pair up to the transmitter, as yet i have not used it in a model.I all so bought one of there receivers that use a crystal and it worked first time .take care if you order one of these as they all so sell receivers that use mini crystals. its a case of you get what you pay for. I will try them out in a runabout model first before i trust them.regards sammyk