Red Layer Guitars are made in Amsterdam by Jort Heijen. He founded his own guitar making workshop in 2015 after studying woodworking for 4 years while also attending internships at Adamovic Basses in Haarlem. His main model is an 8-string guitar inspired by an 8-string bass he helped build at Adamovic for Meshuggah bassist Dick Lövgren

Source: Red Layer Guitars website (27 May 2019)