i have a 113mm bb spindle and am getting a crankset that recommends a 116mm spindle (shimano 600ex arabesque). can i use this spindle or should i try to find a 116mm? Rivendell sells a 115mm for $12. How about that? Or is there really a big difference in a couple mms? what would be the downside? Would the crankset touch the bb? thanks!