See and Hear a 31-Tone (Microtonal) Halo Guitar Played by Stephen James Taylor
King Gizzard Frontman Explains How He Started Using Microtonal Guitars, Talks How Much Money Band Spent on Super-Cheap Guitars for Famous Album | Music News @ Ultimate-Guitar.Com
Custom Microtonal Guitar Has a LEGO Fretboard with 3D-Printed Pieces - TechEBlog
Eastwood Hi-Flyer Phase IV MT Microtonal | Reverb
Metatonal Music
Microtonal Guitar for standard guitar with added frets Vol.I by Fernando Perez & Tolgahan Çogulu (ebook/PDF & audios) - Fernando Perez World Music for Guitar