I am modeling a simple 3D printed case that I want to look like an early 80’s console/computer. I have a vacuum former and want to mount a small display but have a CRT bulge in clear plastic over top. The challenge I’m having is getting that shape. The large opening will be for a keyboard and it will simply mount underneath.
Any ideas are appreciated!
case test.3dm (155.4 KB)
So how does that shape look? I mean there are no clairvoyants here. 
If you need to make an opening for it, it would be a good idea to measure and model it.
You seem to be modelling the case from surfaces, which is usually not great for 3D-printing, since it requires the input geometry to have at least some volume.
I would duplicate the edges of the smaller and bigger hole (keyboard), join them to closed curves, and untrim those surfaces, making the hole case a solid.
You can then use the closed curves and extrude them to a desired height and use these extrusions to boolean true pockets out of the solid.
Thanks for the feedback! I am just mocking up the overall shape is all. I have lots of experience modeling for printing. I’m just trying to achieve this type of shape.
CRT screens as the one you show in the image above are generally portions of a large-radius spherical surface. Can use a cutout of an actual sphere, or can be more or less approximated by an EdgeSrf with 4 arcs or sweeping one arc along another. Note that the edges are not flat - look at CRT screens from the 80’s and you will see that most all the bezels are curved. There were cylindrical-surfaced ones (Trinitron, etc.) and some “nearly flat” ones as well.
For vacuum-forming (we don’t know what type of machine you will use, or what type and thickness of plastic), you need to model your tool with draft angles for a good release action, and also add some extra “length/depth” at the bottom, so you can then cut-off your item at the exact height from the flat part above the radius. What you have now won’t work.
That looks quite different compared to your OP. Such “soft/hard” forms can be explored and then finalised well with Rhino’s SubD surfaces, and rather accurately, too.
