Skypilot,

Yes, the turbo buttons have a small hole for the element and performance is equal to stock Norvel plugs AND the Nelsons. I managed to find a way to allow one to make these buttons without the need of a lathe. You just need to get the proper tap and have access to a drill press. All other bits you likely have or are very cheap to buy.

Working on this now, have a bug or two to work out and will post a new thread to cover how to do it.