I just obtained a 2014 Ninja 1k with the OEM side cases. For the life of me, I haven't been able to remove either case from the bike. I can unlock the side cases and open them. I can slide the latch mechanism that apparently frees the case while the bag is unlocked, but can't seem to get it off. Is there any trick to remove? Do the cases pull straight off? Lift up and off? ?? I'm assuming that the cases have been stuck on the bike for quite a while. Don't want to break the cases or the mounting hardware. Any help would be greatly appreciated.