Just wondering if the plastic panniers are fitted more securely than the aluminium ons, or vice versa. A lot of images of the plastic ons have a cord around the middle section, is thsi to keep them on or for extra luggage; I can't be sure?? I have a good idea how the aluminium ons fit as there made by touratech and I have looked at the installation diagram. (also the BMW ons took a good beating on TLWR so must be good). Is the water thingo useful in the plastic ons?? What limitations have you the owners found?? Anyone got an image of the adventure top box fitted?? All these questions and more can be answered here. I realize there are many threads about the abundant variety, but im just interested in more detail about these 2, I like the factory stuff, what can I say.