Semie Moseley introduced the Brassrail models during his experimental period in the 1970s. These guitars had a brass rail running down the fretboard from the nut joining all the frets together, all the way down to the bridge. The brassrail idea was Semie's attempt to make a guitar with superior sustain. A deluxe version was also offered and with a changeable electronics module, accessed via a brass plate on the rear of the guitar.