TOS Tri-Viewer Initial Drawings

Based on some dimensional help from the good folks at the RPF, along with a couple of great screen captures, I'm starting my initial design work on the Tri-Viewer.

Here is my first stab at a front view.



This does not include the thin pyramid that will be on top.

The question I struggle with now is one of side view. Are the top and bottom lips angled, or not?



For reference, the part I have highlighted in red is what I'm referring to as the "lower lip". There is a corresponding "upper lip" directly above it on the tri-viewer.



My latest theory is that the side view is like this. Flat on the bottom, angled on the top: