The Canjo was built based on a simple cigar box guitar instructions found here
The main modification made was to swap out a standard 1 gallon paint can for the cigar box guitar. Since we knew we were going to use a slide this seemed like a cheap approximation of a resonator guitar. We hoped it would provide more volume and richer sound.
The neck is a piece of 1x2 pine from the hardware store. cut to about 24" in length for this project. A notch about 4" is cut into one end which will become the headstock where the tuning pegs go. These are installed by drilling three holes in the headstock and attaching with wood screws that came with them. These
tuning pegs from Amazon were used.
Two small holes were cut out on opposite sides of the paint can as close the bottom as possible. This is where the 1"x2" is slide in. Some wood screws hold it in place through the bottom of the paint can. The nut and bridge can be made any number of ways, see the cigar box guitar website for ideas. Here, metal plates which were cut down and bent to 90 degrees in a vice. A similar technique was used for the saddle which holds the strings in place on the end of the guitar.