This is my Remix for the indicator holder.
I made two versions; one to hold a standard 1 inch indicator and one to hold a 10mm import indicator. The Import indicator has a smaller mounting shaft so; so height and hole size are different.
Since it can be hard to print and maintain a press fit I elected to go with a Thumb Screw Clamp.
Also found that a narrower version with just to magnets wasnÃ¢ÂÂt stable enough so widened one end and went to a pattern of three magnets. I over sized the holes for the magnets and used Epoxy to bond in place.