Norm,
Apologies for the delay. For some reason any mail from the site gets put in my BT spam filter. Even my Google account has started doing the same

So I don't get the alerts unless I visit and notice.
As far as I can check, the operation of the Silverblue set was the same as the supplied Turn screen.
I'm off work now for a few days so let me install the programs again and take a look. It will be good to blow the cobwebs away and do something 'useful' on these dark, miserable, cold, gloomy, damp, UK nights

Cheers