Thank you for your answer.
It is a second hand gm8, with new motors, but no control box.
I realized that this question had been asked few time here, and the the most common answer was, as you suggested, this one: http://www.siderealt....com/store.html
Version 1 and version 2 of Sitech controller look both cheaper than a proper gemini 2. It is alright for me to spend up to 400$/500$ for a good controller, especially given the fact that servo of that torque are not that common. But 1400$/1500$ is too much for a "simple" GM8, that only carries 30 lbs max with around 10" periodic error, or even more.
The question is: has someone tried to use one of those controller on a gemini 8 with the new SVM-HT motors? is is easy to setup ? What are the key feature that would make you choose one over the other ?
If it is too difficult to find an alternate solution, I might just buy the Gemini2, but first, I would like to assess if the mount worth it.
Edited by dolguldur, 14 September 2018 - 07:43 AM.