Lots of crappy little adapters to use small drill bits. Most are not worth the money. I would suggest either the Dremel or Wen three jaw chucks. They can be chucked up in a larger chuck and are quite accurate.
Interesting as neither of my two Hegners vibrate. I run them at all speeds including full speed without vibration. If yours vibrates furiously as you say there must be something wrong. I'd check that out before abandoning the original stand.
I guess the first amazing thing I saw was the pattern. Amazingly lifelike. How did you do something that large? Second the largest fret saw I ever saw was, I think, 12". Where did you find that? Lastly the incredible finished project. Unreal!
Faye and I celebrated our 51st this past new year's eve. Was a good deal I did not have to support her for the year but I could claim her as a dependent for the year on my taxes. My Mamma didn't raise no dumb kid!
Welcome to the Village Sonja. You are posting some very nice work and you are fortunate to have Hegner. There is no finer. Lots of friends for you here. We look forward to having you become active!