Well, the title sums it up. There is an abundance of blog entries and forum threads mentioning an annoying creacking sound when pedaling. I ve noticed it on both bbs02 and tsdz2 kits. It can be very irritating, and make you hate pedalnig. While there might be other reasons involved, at least in my case, it s definitely due to some play between the bike BB shell and the motor shaft. Since the shaft has to slide into the BB, this is kind of a necessity, and no matter how hard you tighten the shaft nut to the BB it will always slide a little bit when applying pedal pressure. So I d like to start a thead dedicated to fixing this issue. The problem is how to clamp the motor shaft hard enough so it won t slide even when you are standing on the pedals, without ruining the BB. I ve been on the look for a removable filler, like thermoformable plastic, or metallic glue, and had litle success so far. So what would you guys recommend?