Hi, I've decided to rebuild a roady I've had lying around for years. From the research I've done, mainly based on the crankset, it seems like it's a bit of an antique, likely from the mid 80's. Anyway, I want to get this thing going for less than $300. So the main issue I have right now is with the crankset. I don't have the tools to replace the bottom bracket and I'm only missing the chainrings. I reckon I'll need a double / tripple (at least) 122mm BCD chain ring to get me round the hills. The only reasonably priced chainring I can find that will fit on the net is a stronglight 52 tooth SINGLE from ebay, and not the same brand as the original crankset (orig = aenox). I guess my question is am I wasting my time trying to avoid replacing the bottom bracket and chainset, can I get a double / tripple chainring cheap anywhere? As I'm a full blown novice, advice on this or how to switch the bottom bracket (if necessary, considering this bike's an old fart) would be much appreciated. Cheers.