SinuousSinuous guitar headstock Current at 2012 Sinuous is a Grand Rapids, Michigan company that crafts unique, high quality sculpted guitars by Greg Opatik . Also developing an amp.

Made since ” 2012 in my studio Grand rapids MI and local suppliers. Serial number on back of neck. I keep photo records of each guitar I build” [Source: Greg, designer Sinuous guitars, email 14/8/2012]