When I bought my Fender Mustang bass, I was told it was a short scale. The salesman sold me some generic flatwounds (I don't use roundwounds). The trouble started when it was time to replace the strings. I paid about $45 for some La Bella "Deep Talkin'" strings. Tried to install them and discovered, oops, the Mustang is actually a medium scale (30 inches to the nut). The strings won't fit. I only tried to get three of them on the bass, and never played them, but now I'm faced with the problem of trying to resell "used" strings. The bigger problem is what I buy now for myself. I'm looking for medium to heavy gauge flatwounds that will fit a medium scale bass where the strings feed through the body. Can someone please point me to a product/vendor? Thanks.