Hi Stegl,
The radio is JR XG14 and all the receivers are also genuine JR, either RG631B or eight channels equivalent. As I've said I thought problem was my old JR radio which was JR XG7 so I bought new one. All was OK for about three months and then, bang, plane down with the same problem again. But as I said in a later post it might be me with balancing my plane on my fingers, so the CG could be slightly out towards the rear. I will let you know when I rebalance my entire fleet on the jig which I am building right now, thanks for your help, much appreciated, Jan