Can anyone tell me what BB type/size is suitable for a Zaskar LE 1995 (meassured around 70mm so BSA68 or BSA73)? It has a square-drive BB at the moment but since I would like to go XTR-cranks "9-speed Mega Drive" I believe I will have to change BB to one with Octalink? But of course it needs to have the correct threads and width (present BB is roughly 110mm from "axle-end to axle-end")? Another question, are the threadings in the frame regular on both sides but different tools for R and L? The tool that fits on the drive side does not fit the other side...