Hi Brian, give the attached RopeFitting2.3dm a try, you should be able to fillet edges on it now.

I used some of the "untrim" type techniques mentioned in the object repair tutorial to revert the object to the pre-booleaned state and then extracted edge curves by copy/paste, trued up some tangents and also tweaked the inside cutout part to be fused together into one single piece so that it wouldn't leave that little tiny pieces behind after being cut.

Here's what it looks like with all the upper edges filleted at a radius of 0.15:



Hope this helps!

One thing to be aware of - putting fillets on a lot of small pieces like this will tend to dramatically increase the data size of your model. Like your file size may get a lot bigger and these things tend to make quite a lot of display polygons which may slow down your display by a certain amount.

If things tend to bog down after a while it may be due to a lot of little tiny curvy pieces like this and you may need to hide pieces that you are not actively working on, or store them in different files and merge the pieces together at the very end.

But if you don't have too many of these you should be fine.

- Michael