The losmandy box in the image? Thats the standard digital drive unit. Your G11 should have one exactly the same? unless yours is Gemini equipped..
If you dont get the Gemini model, you get the digital drive box, which controls the tracking rate, autoguide input and other motor control functions. With a Gemini G11, the Gemini box replaces this...
At least, thats what I was told by a few places when I was enquiring about a G11.
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