The dec adapter on the skyguider pro is sub-optimal to say the least so I went for the upgrade using this adapter and the matching saddle plate. It’s a very snug fit and there are grub screws in 6 positions to make the fit perfect. That leaves you with a single bolt to clamp it tight. No discernible movement of the scope when tightened up which was a major issue with the ioptron stock adaptor. The saddle plate clamp is equally impressive and it’s transformed my experience with the mount.