Scott wrote:
Yes, I was concerned about the doorsprings corroding and breaking pieces
off to be ingested into the carburetor since there isn't any sort of
filter in the "warm" air path between the heat muff and the carb airbox...

A stainless steel screen should be a standard item over the air intake
on any engine if you are running without a filter. You never know when
something too big to be ingested will get sucked in.

Tony