So everyone around here says you are supposed to crimp DRs and other round core strings before cutting them in order to prevent them from going dead or unwrapping. I installed my first round core strings yesterday (DR Sunbeams) and here is what the instructions in the box say: "ROUND core wire, by definition, has no edges. Hex core has 6. So, at DR we flatten the round core wire to create an anchor for the wrap wire to grip the core wire. We flatten a small section of the core wire at a spot that should lie past the nut at the top of the fingerboard, and between the tuning machines of your instrument. This flat section provides an anchor for the wrap wire to grip the core wire. You should be able to feel this flattened area between your fingers as you touch the end of the string opposite the ball end. Without the anchor the string is likely to unwind, go "dead," and fail to intonate properly. If you need to cut or trim your strings between the anchor (the flattened section) and the ball end...carefully and severely bend, or "crimp," your string as illustrated. The severe bend (crimp) will provide an anchor for the round core. In some instances properly installing the strings and then cutting or trimming the excess wire will suffice to avoid wrap wire coming loose from round cores." Now consider the parts that I've underlined. If you are installing the long scale strings on a long scale bass, then there doesn't seem to be any reason to crimp the strings, at least not according to DR's own instructions.