The great thing with the Baader Clicklock diagonal is that the nose unscrews to reveal a female SCT thread - which threads right on! However the Baader Nexstar locking ring is required to lock it into place. Solid as
The other thing about this is that it keeps the focal length as short as possible (close to using a 1.25" diagonal), and physically it's also very short and I can reach zenith on the SE mount with the scope dovetail shoved all the way up the clamp
