I have the basic bench for the HDM complete and just in time as I received notice that my HDM has shipped.
As previously mentioned the HDM will sit on a 44x44" Kreg universal bench. The frame on top is made out of strut channel. Under that is a transmission drain pan with the drain hole cut out and sheet metal that covers the rest of the top of the bench above where the HDM will be. The idea is the chips can be pushed out the back and down the drain to a collection bucket that will sit underneath.
Eventually I’ll build an enclosure that will encapsulate the machine, but for now it will just sit on top of the bench.