OK I have gone thru about 20 rubber bands - they just do not hold up and break - I am lucky I have not lost my Onyx yet. I have juicy 7 disc brakes and they work very well. but they do not allow you a lock, so you can mount and dismount. Has anyone drilled a hole in the handle of the brake lever and added a metal rod like a coat hanger to clip around the steering handle? Any other ideas?