Today I discovered that my tank bag (like the one in this photo) had a slight problem. The bag is attached to the locking ring device by four screws with nuts underneath. Screw head are inside the bag. They are not locking nuts, nor are they Loctited. One of the nuts had disappeared and all the other three screws were loose. So I replaced the missing nut and tightened all four, with Loctite nutlock. If you have a similar bag, I suggest you check and tighten.
