Sun and moon concert ukulele (WIP)

As I said, it is a WIP but I'm putting it here anyway in case anyone wants to fiddle with it. Rn it works fine but only with modifications. I'd make them myself but I am a total noob when it comes to CAD work and I was using SelfCAD and my trial ran out before I was able to notice the technical problems.

The modifications that need to be made concern the head:

• the head sits at an odd angle, which causes the strings to jump out. I used metal rods to adjust the angle after printing. 
• The head should fit into the neck just fine, but it is possible that the connector will need a bit of sanding depending on your printer.
• An aesthetic nitpick, but it should be smoothed, somehow. There are some rough edges and weird angles where the heart head was merged with the concert ukulele neck.

There is a hole in the neck for a metal rod, which should help keep everything in place. If you do not have a metal rod, print a few strips. They ARE needed, otherwise the neck can and will bend and break under the pressure of the strings (first-hand experience. You don't want to be me.) I recommend printing the head with at least 30% infill. I used only 15% for the lower part of the body and it works, so consider 15% the lower limit. The lid was printed at 30% as well. The gearscrews and gears were printed at 20%, I believe, and the pegs at mere 15%. I printed the back of the neck at 20%, but ideally you should do at least 30%, and the fretboard was printed at 15%.

The ornaments on the fretboard aren't mine, the constellation can be found here:

https://cults3d.com/en/3d-model/various/constellations-orion-gemini-and-hercules

And the tuning pegs feature these stars:
https://cults3d.com/en/3d-model/home/mario-star-decorations

Showcase of the ukulele with fresh strings (warning: I can't sing):