Thanks for al the replies. Yep, sawdust is in some very odd spots. Also nice to find screws and electrical connectors in the cavities for slide mechanisms. I have spent time in several RV plants (consultant for computer systems). 25 years ago I was impressed with the quality coming out of the ones I was working with. Maybe quality is no better or worse but shear volume is much greater.
So looking at my table and wardrobe, there is an area under the wardrobe that allows for electrical wires and plug, it's fully enclosed and really is just a false bottom for the wardrobe. If I slap this area from below, sawdust filters out of gaps against wall. So, for now I'm buying the poor clean up and production dust.