Thank you very much, Mytran!
You mention, however, that the lift is 7 feet in diameter, whereas your detailed diagramm of 1 inch-grids show 16 grids, how does that fit?
as near as I can tell the big grids are subdivided into smaller grids. Each big grid is 5 by 5 smaller grids. If the smaller grids are square inches, 16 large grids would be 80 inches wide, which would be 6.6666 feet, which is almost 7 feet.
And that is a possible basis for interpreting the diagram until Mytran responds.
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