Our RedCat EAF/AF3s dovetail kit has been quite popular in astrophotography community. We raised the telescope just high enough to snugly fit the autofocusing motor between the telescope and the dovetail. But its even more versatile than that.
If you happen to have Samyang/Rokinon 135mm lens at disposal, you can mount it into the RedCat ring and use it as lens autofocusing solution. Our kit is compatible with 110 and 210 dovetails that come with the cat telescopes.