Overhauled the bottom bracket on my 1960's vintage French bike yesterday. Lots of problems caused by ameteurish work done previously, but that's another story. How tight should the axle be? The books I have are somewhat contradictory - "screw in adjustable cup all the way, then back off 1/8 turn", "slight play in the axle", "no play in the axle". Right now, it has very slight movement in the axle, back and forth and side to side. Too loose? Just right? The bottom brackets on the other bikes I have vary - some are rock solid, others also have slight movement. The bike is sitting on the stand now, so this is the time to make any adjustments!