Only the ceiling plate with said three screws (included with 10er dowels + screws) attached. Then the clip platform locked with Allen screw, is ready in advance of the substructure. Up to this point, the construction period is ca.7min incl. Drill holes.
The projector can be due to freely movable mounting arms easily attach to the base of the holder, without having to handle on a ladder at the top. Conveniently this can be done at the table. The package includes optionally black (short) mounting arms for smaller projector.
If the projector with the base firmly connected, it must be screwed only into the clip-platform and ready.
Total construction time about 15-20min, then a good piece securely hangs just below the ceiling. Looks very nice clean and compact.
Class design.