I have a 2024 Giant Stance E (electric and full suspension). I find my Kryptonite lock is too heavy (I am 80 years old and 135 pounds) to carry in my back pack comfortably, So, I need to be able to carry my lock and some groceries. I have looked at the Aeroe and the accompanying 12 L bag. The Thule has one that also mounts on the stays and is much cheaper. Topeak was recommended by the LBS, is cheaper still, and mounts on the seatpost. The proprietary Topeak bags are expensive. Has anyone had experience with any of the three? Critique? Recommendation? Thanks