HI All,

Has anyone seen / used or have tips for mounting these ?

Rusan Roll-off rings with extension, 19 mm rail, Zeiss VM/ZM rail, Steel, Allen screw - Optics-trade

This is my first experience with roll off mounts with extension and want to be sure i'm not missing something basic, i cannot find any tutorials on the internet showing 'pivot' extensions. ( they swivel freely and only lock when the dovetail screws are tightened)

Following normal mounting procedures they seem to attach securely but its always better to ask and be sure.

Thank you all in advance for any help that can be offered!