Got the wedgies out here within a week, Joe......many thanks......
What a clever, simple fix (of course, you had to have the engineering knowhow to find the actual root cause in the first place). 5 minute instruction read, 10 minute install, and rock solid.
As someone who has applied two “fixes”, and had them start to fail in 6 months, I can only say - get onto Joe and Ann’s wedges if you want to fix your F3 vibrating mirrors. They may be simple (the wedgies, not Joe and Ann ), but their value to me is way more than what I consider a cheap asking price.....and it’s a quick installation

Pete