Putting in ceilings and found this on this idea on the net. Took me an hour to assemble.
The drum at the bottom is filled with lead I have been diving out over a few years.
So very simple....the drum just has to be heavier than the support for the board and the board itself. Pivots around the engine hoist hook hole.
Easy to line up boards and fit plastic joiner strips. I use screws to secure the boards as I kept missing the nails and hitting holes into the boards.