Sorry Mike,

I hadn't forgotten your excellent show. It's been in my list of references all along. However, since I started by designing a single show which then got split into three, reference to show 1569 got relegated to the last show in the series.

I didn't quite appreciate the effect that would have, since the three shows were still one in my head. As it stands it looks as if I have disregarded your contribution, whereas what I had wanted to do was move slowly towards it, looking at possible alternatives and showing their advantages and disadvantages along the way.

Show two is in the queue for the 31st March, but show three is still in production. It will be the next show I upload though.

Dave