I am interested in hearing what the experienced members say. I am also playing with the idea. From my reading and asking around, a foam and thinner ply sandwich seems like a good plan.
@billiebob has what looks like a fairly simply but strong built square drop that seems to get a lot of use...
I’ve used it on mobile and PC since it was new in 2008. Search results have gotten much better over the years.
*mobile when I got a smartphone in 2010 or so.