Martin, you raise an important point about buddying. I want to be able to ensure that my 8 year old grandson can receive training from the clubs trainers so presumably I will need to buy two transmitters to ensure that this can happen. To upgrade from my current Spektrum DX7's is going to be quite expensive. I was planning to buy DX8's but it is the 12 receivers as well that really puts the price up. I have been looking in detail at the Radio Link and Perkins web sites and the manuals. Also there are some YouTube videos. So far I have been impressed. Indeed the programming seems more logical than my old DX7's but I don't know how much easier it is to do the DX8. I will keep digging.
Thank you all for your comments.