I have Epiphone Viola bass. It's short scale bass, 30.5". But it seems its tailpiece is longer than others. The string I want is Rotosound Tru Bass 88. It has three kinds of lengths, short, medium, and long. The list below is string length guide on Rotosound website. - Scale Lengths - Short Scale 30" Medium Scale 30.5 - 32 Long Scale 32 - 34 - String Lengths - Ballend to Silk - Short Scale 32.5 Medium Scale 35.25 Long Scale 37 Which one should I get?