Deane,
I did pm you yesterday but I'll repeat it here.
The stuff you sent was exactly what I wanted. However, I will not be attempting to open the SD7 because as you know, we are on this damn virus lockdown the same as you. The keyboard is working perfectly apart from not being able to connect to a computer and if I should damage anything whilst opening it I will not be able to take it to be repaired.
It could be months before I attempt a repair but rest assured, I will contact you and let you know how it went.
Thanks once again.
Alan