My friend, and builder of great guitars, Franta Furch, introduced me to these technologies, showing me how to cut pearl with lasers. Jaroslav Prucha, who builds professional grade bluegrass instruments in the Czech Republic, has introduced a new version of his Jason Burleson signature Spirit model banjo with a number of component changes to make the instrument more lightweight. The Gold Tone AC-1 and Rogue starter banjo are great examples of this. Don't know about other models. Check also our new part, our NEW FINEST QUALITY PRUCHA ONE PIECE FLANGE PREWAR SPECS REISSUE.