I have the first picture saw. Have the bolt and rubber sleeve. I understand the principle behind top and bottom feeding But my saw and anyone else who has that saw it is not a top feeding saw. Can not be done with accuracy and thus they came out with a new saw and I have no idea what they call their saws now. As far as bottom feeding large projects, how often do you do that? A blade will flex so much that you can easily thread in any hole. I have been a bottom feeder all my scrollsawing life and have scrolled all size projects including ones bigger than my saw would allow but you adapt.
So I am having a hard time following Rockys question. If he is going to top feed with that saw he will not be able to do it. You have to have a device to hold the arm down to play games with the blade holder underneath. Again I am not following this whole thread.
Back to you Kevin, you are saying on the saws that had the round holders they did not have that (boss) or stop??? I have cut on those saws before I bought mine which is an ultra but I have no idea what the newer saws are called. Have to look it up. Aren't you buying a new saw or did buy one??