Does anyone know where I can find a step by step guide to changing the strings on my UB? This is my first time, and the Supernil strings have no instructions. My bass measures 41.5 inches from nut to bridge, but the strings seem much too long, and would leave a mess in the peg box if they aren't cut or shortened. It would seem logical to shorten the strings by adjusting the length at the tailpiece end by retying the knot behind the brass washer in a different position and then cutting off the excess. I assume the colored winding on each end of the string has a purpose like identification and/or to prevent unraveling, but it's not clear. Also, each string has a short piece of plastic tubing. It appears to be heat shrink tubing. Does this go on the strings where they cross the bridge to reduce friction when tuning?