It looks like there's some extraneous geometry (faces) that are blocking the vents... I can sorta see it in Cura's preview, but once sliced, it's solid :/the side vents/speaker grilles might not come out that well...
Lovely! Totally agree with @markyb86 on the awesomeness comment.
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If I squint my eyes just rso, it looks like the Macintosh Portrait Display sitting on a IIsi or placed at a jaunty angle atop an LC475? :lisa2:
edit: thinking about those machines (and eeeks! from @Danamania on seeing a Quadra 605/Portrait combo) I realized a thing or two might work out a tad better. They'd be much easier to do with the Portrait Display acting as the lid of the case. The setback and height of the joint becomes an intentional mimic of real world spacing.
The same might be true for your Q700/IIci form factor case if substituting the 13" RGB as an inset lid? Fitted 12" RGB for the LC series also becomes an interesting possibility?
Here's an enclosure for a PowerBook PB 1[4-8][0,5]c? li-ion battery I drew. It's expected to be used in conjunction with the locking tab from an original battery. Thread with more details over in the PB forum:
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