Hi Tree,

> Do you first do an offset/shell, then see where
> the errors occur?

Yeah, that is one method, when you see where there is a problem happening then try to zoom in to that area to more closely inspect what is happening there, are there any little tiny slivery surfaces there, do pieces overlap, stuff like that.


> Or is it possible to find them before doing any operations?

It depends on the situation, but if you're going to be doing stuff like fillets it is best to try and keep your curves aligned when they are initially drawn - things like if you are putting in some lines and arcs don't draw things with snaps turned off and only eyeballing them, use tools that will generate tangent arcs or use tangent snap when drawing lines so that you know things are all set up right off the bat.

- Michael