I'm contemplating replacing the bottom bracket (Swiss) and crank (Nervar w/ 128 mm BCD) on my Moto GJ as very early preventative maintenance. Everything is in great condition, but I've been thinking, maybe it makes sense to do it now, keep the stuff in great condition, and not have to worry about failure later on. Plus, who knows what the availability of replacement Swiss-threaded BBs in the future. Right now I can get a Phil Wood or MUCH cheaper IRD. Is this a crazy idea or good idea? Am I thinking too much?