I use two cords, one for the starter and one for the glow driver, and have NEVER had either of them come anywhere close to the prop. I put my flight box to the left of the plane, when looking at it from the front. I always route the wire that goes from the power panel's glow driver to the plug under then over the wing. This keeps the glow wire away from the prop. The starter wire, on the occasions where I actually use one, is then easily routed away from the prop. Bottom line, it's not at all difficult to develop techniques that will keep both wires away from the prop. Eliminating wires is a preference.