G'Day Gary,
Thanks again for you help. It has clarified a lot of points which were nagging me. And finally I now understand how to read encoders. That was a big obstacle until now which you've have made simple to understand.
The AN I got came with the latest software update, 3.0.1 and a couple of gears which until now I didn't know what they were for.
I will register my AN as you've suggested and will post a first light report when the scope is finished.
Cheers,
John