Hi Rudl - just to help clarify, Pilou is talking about this button here:



The Boolean "Merge" command slices everything up and leaves all the pieces behind so you can then just delete the pieces you don't want.

It's useful for situations like you have here.

The other option for cases where you want only some portions of an object removed is to use the Trim command, but the boolean merge command is kind of easier if it works for what you need.

- Michael