Looks nice from this angle, doesn't it? Well, that little blob of spaghetti in the button hole should be a clue that maybe something's off...

Here's some better views of the problems:

Yes, the last picture is blurry, but you can see that there's support material stuck on real well. That means this chassis is scrap.

The chassis is getting reprinted. But I did learn a few more things:

• Tree supports in my version of Cura are not yet ready for prime time. They don't contact by point, but rather by area or perimeter. This makes them much harder to remove, and more likely to do damage as they're removed.
• Print tubes on their side whenever you can for faster printing.
• There's not quite enough space for wires to run around.
• The button hole is too deep to access the button at all.
• The button hole is too far towards the blade. Easy enough, but fixing that means I have to juggle some stuff to keep space open for electronics.
• The rest of the critical dimensions are basically correct.
• The chassis does fit in the saber, with around enough room to spare to fit everything.

Next version is printing already. Hopefully I'll be able to physically fit everything in the saber soon!