Hey guys. I have a rosewill seat post rack bag that is on my schwinn seat post rack. It is fairly secured with velcro onto the frame. However, I'm noticing that it looks like the bag is about to fall and looks like it's not that secure when I lean my bike onto the wall. I'd like to see if there's a way that I can permanently lock my bag completely onto my rack using a locking mechanism. Is there a locking mechanism for bags without the locking system? Thanks.