I put together a spamjo with frets. Seems to work great so I am going to set up a Canjo build hour at the Death Valley 49er Encampment in November to bring more attention to these instruments as well as CBG's. I will assist 20 lucky people putting together a canjo of their own. I am currently building a CBG - just need to add frets and strings.I'll post pictures of the CBG when finished. Will play both instruments at the encampment this year.