Mini-tour to Paris and back please

As @pdlouche said, great bag for the price (£30 delivered). But we both had to modify it as the standard version was all over the place. I spent 3 evening sewing webbing with loop and velcro to get a stable / easy to use bag. Weebing on the side plus on top the bag to bring it up again the bottle cage holder.
Cost of webbing + loop (would have preferred plastic but was in rush) + thread + velcro around £10 to add on top of the price of the bag.
Still much cheaper than equivalent i found and totally adapted to your setup.