Hi Ed,

> Thanks Michael - I'm going to try making a relief pattern in
> Zsurf on a cylinder, then boolean it with a same-size ring in MoI.

One note on this - since you will be dealing with an open surface with the ZSurf generated bit, you may need to use the Trim command to cut the cylinder and leave a hole, then use Join to glue the pieces together, rather than using booleans.

Booleans are more oriented towards working on volumes, so they may not understand which pieces to keep and remove automatically if you are working on open surfaces.

But Trim works on the surface skin of objects only so it's more what you use (along with Join at the end) when you're working on surfaces instead of volumes.

- Michael