Thanks to folks who responded.  Here are the recommendations: Gloria Horn Sewing Studio – Castle Shannon/Mt. Lebanon www.gloriahornsewingstudios.com   Tim Grottenthaler 724-287-5075 Better with older machines (including antiques), Singers He apparently does repairs for Joann Fabrics in the N. Hills (also recommended).   Thornton http://www.thorntonco.com/home - N. Hills & Murrysville