Rolodex replacement knob

Far from perfect but works too keep the old thing alive a little longer. There seems to be a demand but the only replacements nowdays are a whole new rolodex and they don't even have covers anymore. This was designed to fit the metal spring of a model NSW-24C rolodex's broken knob exactly. I used a burr tool to chamfer the edge then heated up the connection point (on the replacement part) with a mini blowtorch and jammed it on to fit, then pulled it off and put liquid cement in before putting it back on. The cracking on the clear and opaque plastic casing was fixed with clear polystyrene modeling cement from a craft store.