My wife really like her Ortlieb handlebar bag. The only thing bas is the strap hook falling from their knob. Even worst when riding!!! I have found a simple solution. I have made rope loop around Ortlieb Ultimate handlebar bag side knob and sewn them together. No modification to the bag body. Then i clip a strap to the rope loop. The rope loop swivel around the knob and doesn’t rattle since this is a rope. Chantal tried it a few times and she is very happy. It make her bag better.