i bought this things that you put on the straps of your backpack to make it a saddlebag!!
They are called "BackPans" and i found them on marketplace, is a local designer in chile that wanted to have an alternative to make any backpack a saddlebag. They are 3D printed and support 5kg Max but he told me he is working in a new version for more weight.
its been a game changer, you can see in my other post in the subreddit what i did before but this is much more comfortable. Thanksyall!!
by devizzzv