Hi Jo,
Don't worry about the lack of response. It is not a reflection on you but a good sign that at the moment our KNs are all working well and there is no need of a technician. I am sure most of us Techies have noted all you say just in case we need this valuable contact in the future. I know I have and I intend to tell everyone about it at the Keyboard Club. You have been very unfortunate in having this problem but hopefully all is well now.
All the best - take care.
Audrey