Thank you very much, Benzmac
Saved me a lot of grief thinking about it. I think that I have read where people have suggested replacing them as preventative maintenance even on my M104. Now that I have read your post, I will forget about it for a long time.
In a very short period of time, I have come to appreciate the great public service you are doing here, and want to wish you well with the new facility. Wish I was closer to you!