I think it must have something to do with build quality in the engine as I have never suffered from this issue and my M3W spends up to 6 months without starting the engine.
I suspect you are correct. When i took the reed valve apart to check to see if there was anything amiss that I might be able to rectify i noticed a high spot in the case keeping the reed valve from closing completely. I noticed that high spot on
it by looking at the polished area on the reed itself. About a 1/4” diameter area of discolor, and then looked for corresponding spot on the case and sure enough there was one.
Putting a super flat hone onto the surface of the case keeping everything parallel would be tricky and probably get crud into the oil passages.
If i ever have to break the case open I am going after that defect.
