Robin,
If you want to find out more about the Sitech controller then join these yahoo groups.
http://tech.groups.yahoo.com/group/sitechservo/
and there home page of the maker Dan Gray
http://www.siderealtechnology.com/
Also take a look at this conversion done by the group moderator.
This is his conversion of his G-11
https://sites.google.com/a/sitechser...-sitech-servos
Also have a look at what this mount can do with a Gurley Encoder added using Sitehc Tick mangement. Note this is similar to what the TDM product does.
https://sites.google.com/a/sitechser...urley-mounting
Note that even with these mods, Chuck has advised he can still switch the mount back to factory default.
And i reccomend you download and read these documents
http://www.sitechservo.info/controller-manual
But I would still say the easiest option is Gemini and it has a large userbase of Losmandy users.