I bought a Celestron StarSense but neither of the included mounts would work for my application. The default mount has a curved base to fit larger OTAs and I already have an autoguider popluated in the dovetail acc shoe. I have an 80mm refractor mounted using Astro-Tech rings. The rings have flat tops with 1/4-20 holes predrilled. This adapter is meant to mount the SS to any flat surface. This mount uses the bracket that the camera comes installed with from the factory (large OTA) which is a 2 part plate. I made two different designs. One uses a single mounting point and the other (pictured) spans both mounting rings with the holes centered around 88mm. Design is similar to the factory mounting plate with a tapered doevetail shape and notches for the lockdown screws. Mounting holes are recessed for 1/4-20 socket caps.