Yet another ArgoNavis newbie here as of today.
I've just bought John Glossops (JohnG) unit and G-11 encoder kit from him, as he hasn't used it since moving to his Tak NJP. Better than sitting in a box, he offered to me whilst we were imaging off the tennis courts down at BSG, so I didn't hesitate to say yes!
I've just installed the encoders - what a pleasure. Very nicely made by Losmandy - encoder, case, gearing (& delrin cover) and bearings. A breeze to install on both axes.
I've fired it up and have set the encoder steps. Now I guess I wait until a clear night to drag it all outside and do the do!
Great to have Gary here as a reference. From what I've heard he's bees knees in terms of support. Makes me feel good about going down the ArgoNavis push-to path rather than Gemini.