I think this is all just the nature of these machines and we all need to get used to it....or we are used to it.
Theres only so many things you can do.
The thing about air cooled engines is it is designed to suck air...and dust into the area you don't want it. It wants clean air but it's not available.
The carb is also an issue.
Water cooled engine with no engine fan?
Some sort of exterior generator and not an interior generator/stator coil?
I know for a fact the units want an elevated airbox like swamp buggys use or a lot of commercial lawn mowers use....but higher....above the hopper.
I wonder if LT Rich has ever thought of a lithium Ion rechargeable unit with no gas engine.
Just thinkin outloud here...