14mz thats a nice radio, in theory you could have both models switched on and just switch between model memorys, im not to familiar with the 14mz whether you have to turn it off and back on again. You would need to test it though, ive done it once with a plane where i turned the radio on and the plane then realised it was the wrong model so just switched the memory and everything worked but half way through the flight i lost control, obviously its not so important with ground based stuff but you dont want your track loader to go ape**** into a bridge or something you just put it on the construction site
Im going to pull another reciever out of 1 of my helis tonight so ill have a play about and see if it works ok.