Further to my post of the 8thAug regarding failed IRSM board. Well I sent the board back to HorusRC with a covering letter a few days after my post.
After a few months with no response sent e-mail to Support at HorusRC, they replied with in the hour to say they had not seen my package with the returned board, but they would let me know if it turned up.
I was by this time feeling well, that's the end of the matter, when at the end of November, I received an e-mail from HorusRC saying they had received the board, which they had repaired and asking how I would like it returned.
With this level of support I was very impressed, and placed an order for a x20s, with a request to pop my repaired IRSM Board in with the Radio.
This morning 13th Dec received my order with the enclosed board, all working correctly.
You could not wish for better service thank you FrSky/HorusRC for your excellent product support.