For Sale: Complete Set of Obligatos w/ Extended E, lightly used Straight trade for lightly used Passione Stark set w/ Extended E or $100 shipped CONUS These were put on my bass by a luthier along with an extension recently, but they didn't really suit my bass. Lightly used for 2-3 weeks and promptly taken off. Ideally, I'd like to do a straight trade for a lightly used set of Pirastro Passione Stark w/ Extended E, as I'm interested in them. The Obligatos come in Bel Canto envelopes that replaced them, since I didn't get the Obligato envelopes back. Thanks!