thanks to both of you for giving it a go.

Yes to all of Christophers answer.

It's a useful tool in it's own way.

I did feel it was purely the mechanics of moving a mouse to the particular tab which set the time as much as the thought process of finding , recognising the note on the fretboard and then the correct tab.

I'm happy I'm getting right answers most of the time and the wrong answer is usually a silly response being too quick and not recognising incorrect string.

It is what it is.

Dave

ps Happy New Year and thanks for all the useful responses to my not always useful questions. 2021. The year I crack this guitar malarky