You'll need a big printer for this - mine is 285 x 285mm All parts are printed in PLA with 0.2mm layers. Set the line width to 0.4mm so that the thin walls print properly. On the neck, use at least 4 perimeters and 35% infill.
The top and sides print as 3 pieces, the back prints as 3 pieces, and the neck and fretboard both print as 2 pieces. All body parts and neck parts are glued together with superglue. (There are ribs on the inside of the body pieces where you can use small binder clips for clamping them together.) I used gel-type glue and a brush-on accelerator. Then I went back over the seams with a very thin superglue to get any cracks I missed.
You'll also need medium fret wire, a set of tuners, a set of bridge pins, and a 1/8" wide bridge, all available from Steward MacDonald. Use light or extra-light gauge steel strings.
The neck bolts onto the body using 1/4-20 screws that thread into the heel-rod part of the truss rod assembly (see trussrod.pdf). The trickiest part (aside from the printing) is fabricating the steel truss rod.