I've posted before. We didn't have room in the building. We brought in a shipping container with double end doors, and dual folding doors on one side. Blocked it 'level' with wood, and built the router inside. Idea was we could drag it onto a flat bed, drop it off elsewhere and need nothing other than a cord to have it up and running.

12" long 1/2" ball endmill in the Avid spindle. Milling glued up stacks of MDF, hand finished and sealed with epoxy, any runout or accuracy issues ... just weren't an issue. One mold was a dumpster full of scrap. I wish I'd taken pictures ... but 'NDA' ...

Not that I don't have any ;-)