Originally Posted by jacksbike

If I am understanding this correctly, you are thinking of flip-flopping the spindle every few months. Most bb spindles are specific, if it is one which has loose or caged bearings, so that the right crank side is a few mm longer than the left hand side. This would negate the possibility of doing this. If you have a cartridge bb, perhaps they are less length specific. I have never thought about it, but I guess every time that you reattach the alloy crank arms to the steel bb spindle, you are enlargening the square crank arm hole a bit.