Quote Originally Posted by rgsparber View Post
I’ve tried using neodymium magnets. They slide. You certainly do not want to use them as filling buttons. They will shatter.

Rick
What kind of ''filing'' are you doing? I have not tried it out but magnet's field may require a minimum thickness of material to stick properly. Not sure if you use one underneath as well if it would have to be perfectly aligned. Once the curve is well defined one can remove the guide and fair the curve freehand with some skill.
Rob