You're welcome Magnus, I'm glad that function will work for you!

Sometimes it can be hard to immediately recognize all the stuff that is packed into a particular command, which is why I wanted to mention all the details here. This should get better once there is some proper documentation though.

You may have also gotten initially stuck because MoI's boolean Merge asks you to pick all objects in one set, while Rhino's BooleanSplit has you pick them in 2 sets more like Difference, so the steps are slightly different.

- Michael