[Jim A]

Ken, if you look back at the first page, you will find your initial response: "Why do you want to remove the knob?"
To that, I responded: "I know."
I knew because EBasil stated it in the first paragraph of his post.
I thought at the time that we were off to another testy series of your abrasive comments.
I hoped I was wrong, but back you come now.
Sonic65 and Prowbar have tried above to break it to you gently that your approach often rankles other members here. I have tried to do the same in the past, obviously with no result.
There are no downsides to being courteous and helpful here.