Hi Rudy,

> I got it.
> I made a mistake in building my head....started with the inside of it.
> But I should have started with the outside of it.

Yup, with the outside first it would generally be a cleaner approach because it would have less intersecting pieces at the end.

Things get more complicated when there are a greater number of pieces simultaneously involved with a boolean. Also it can easily happen that your result model contains fragments of a bunch of pieces all joined together - it is just better in general to have a smaller number of pieces when possible.

In an ideal world you wouldn't have to worry about this, but ....

- Michael