Here it is about 90% done. More expensive and more time than I thought, but it should work well I think. I still have a little wiring to do, ducts to make for the fans, more linolium to lay, and need to seal the gaps and seams. After that make some sort of base for it.
Also.. I have (2) 1800 particle filters between the fans and the powder so I don’t expect anything to get to them.. do I REALLY need to worry about the flow of the fans? I don’t think cooling will be an issue.