Edmund, can you tell me what the mechanism to prevent this issue in the MX350/MRF250 is? Is it frequency addressable or something else?

Edit: Never mind, I downloaded the pdf for the MX350 and see that they are indeed addressable. It seems I could keep my current RF-S200 setup (remote & RF receiver) and get the MX350/MRF250 combo for my other setup. Thanks Edmund!