I have been given to understand by my local model shop that the R7M is not compatible with the older R6M RX's. I was interested in buying one of the new Planet T7 transmitters for its extra channels, hoping I could still use all the old RX's in my existing boats. At present I operate most with my single T5, just having to buy extra receivers for any new ships. No, apparently, I would have to change all my RX's to R7M's.
Still, their RX's are not expensive, but would mean getting several of them, unless I carried on using the T5 TX for the ones I already have. I may still buy the new Planet T7 and re-equip the other boats over time,