I have an x-guider for sale that I don't use as I'm an OAG user and always will be...
The X-Guider has the ability to alter the pointing direction of your guide scope (or any small optical system) in tiny increments in order to align one system with another. It has a +/-5 degree adjustment range, and can hold up to 6kgs of telescope.
I would imagine you could use this easily when using double scopes to align the scopes together, or alternatively, to find a guide star if one directly on-axis is not in the field of view.
These are $549 new at Testar.
I'm selling this for $300.
https://www.testar.com.au/collection...ducts/x-guider
Alex.