[quote name='owen' timestamp='1464123000' post='3056803']
More importantly, the fretted is fine on G and A, appreciably louder on D and sadly quieter on E. I presume it is time to take the bridge saddle off?
[/quote]
I took the bridge saddle off and retrieved a small strip of metal from under the piezo element then screwed it all back up. The G and E were fine and dandy but the D and A vanished. I then put the small metal strip over the piezo element under the D and A. It is now OK but it is too late for me to turn the volume up to a level that drowns the acoustic volume to check properly. That would go down like a bucket of cold sick as the rest of the house is asleep.