My OEM saddle knobs started to rust and the plate itself only accepted Losmandy dovetails. I recently purchased a scope that uses Vixen type dovetail, so I decided to upgrade to a dual saddle. The attention to detail by ADM is great and the Celestron orange knobs are an exact match to mounts orange details. One of the knobs was damaged in shipment and when I contacted HPS they immediately had a replacement shipped from ADM. I can now switch scopes with little more than loosening the knobs sliding out my Celestron Edge 11” scope and sliding my Explore Scientific scope in to the Vixen dovetail.