Hi Tony, I'll probably be making some method to adjust the panel size.

Floating windows (other than temporary ones) are something that I have just tried in general to avoid with MoI's overall UI since they tend to hang out overlapping the main work area, making it cluttered and obscuring your view of your model data.

I'm not particularly worried about such a deep nesting to start with though, I'm more concerned with whether the basic UI works well to start with on something with just 3 or 4 levels of nesting. Then I will look at how to handle deep nesting after that.

- Michael