Summary

I re-cut the neck part from Solstie's playable Ukulele: https://www.thingiverse.com/thing:268090

This makes it a bit easier to print the neck from a common sized printer. I'm using the Ender 3 v2 (220x220x250). The headstock is attached to the neck using a block that is inserted into the two pieces. This makes it a lot stronger and easier to line up when you're gluing the parts together. I also cut the fret board separately. This allows it to be printed flat on the surface of the bed.

For mine, I also paused the print of the fret board before it started printing the frets themselves and swapped out the filament color to make a nice contrast between the fret board and the frets.

I recommend orienting the fret board at a 45 degree angle on your build plate as shown in the screenshot. This makes it have a nice clean finish the the layer printing up and down the fret board.

I did not re-cut the body of the Ukulele. The full sized version from Solstie's thing prints just fine on my standard printer.