Dear Mr. Evans,
Thanks for the update and good to read that both companies taking our complains serious.
Your statement that it can be caused by the heat could be correct but why have 40% of the owners (who took part in the bevel box survey) a noiseless one ? They also get hot and are still silent.
The main culprit could be (or need to be) a difference in tolerances during manufacturing.
A good advice could be to contact Garage 56 who also try to find a solution to this nasty problem. Perhaps they know the answer you're looking for.
We hope you find a solution soon and we all can enjoy our M3W's even more as we do now,
