Uggh. I just got off the phone with Musicians Friend. They will not take a return on the set of strings I ordered. I ordered D'Addario ECB81-5 flats for Long Scale, but they will not fit on my 35" MTD Heir. Apparently I need Super Long. Sadly they have a 'no execptions' policy on strings so I ate $40.00. Somewhat understandable, but annoying. To double the pain, I broke an old string getting it back on.