Hi Anthony, it likely is possible to do it, but it's probably going to require some fairly difficult steps like maybe working part of the time at one scale and doing other operations at a different scale.

Just fundamentally the model that you're trying to build is not a particularly good fit for CAD technology in general - a mixture of extreme different scaled features within the same design will lead to many problems.

Once again, my best advice is to not try and create a model that has that kind of problematic structure in it - maybe put a line in there or make the end just come to a simple sharp point.

It is still not very clear to me why you think that little tiny radius is necessary - what kind of CNC are you expecting to build with that will be able to cut such tiny features?

- Michael