Manfrotto Sky Track Ceiling Mount Brackets w/ Rod L-Mount and an aperture ring lock

and an aperture ring lock

Clicked and de-clicked aperture ring with Aperture Ring Lock Switch

One lever locks three pivot points

The change is easily made: just exchange your metal platter for Acryl it

Manfrotto Sky Track Ceiling Mount Brackets w/ Rod L-Mount and an aperture ring lockComprised of a bracket to be attached to the ceiling with 4 screws a 1m long M12 rod completely threaded 4 M12 nuts and a bracket for the rail fixture The rod can be cut to the desidered size and then attached to the bracket by way of the nuts supplied The rod must protrude approx 1cm on the inside of the bracket When fixture is completed it is then possible to regulate a perfect rail levelness by adjusting the nuts which fasten the brackets