It is a well known fact throughout the bass world that neck-thru basses have more sustain than bolt-ons. Before I pose my question, it is important to tell you that I have a soft spot for neck-thru basses. But currently, I only play four fretted. I have been searching online for a 5-string fretless bass. But so far I haven't found a neck-thru 5 fretless in my price range. Okay, here's what all of this is getting to... Will a fretless bolt-on bass have more sustain than the same model fretted bass?