Transforming downtube/stem shifters into thumb shifters?
I don't care for the 'black plastic' look of most thumb shifters that I've seen. I'm wondering how hard it would be to decompose a set of thumbshifters and a set of downtube or stem shifters, and then reassemble them such that I now had a set of all-metal thumbshifters that would agree visually with all-metal brake levers and clamps on a cruiser/stache bar.
Has anyone successfully done that? Alternatively, does anyone know of all-metal thumbshifters that would suit a 3x5 setup?