If any of you had the unfortunate or helpless feeling as I have had when you try and take the saddlebag or trunk of the brackets and all the key and lock does is turn turn turn, really sucks!!
Well, what I did was take the locking mechanism off the bag (in my case bags), unscrew plate on back remove circular tumbler (making sure not to lose the spring that holds pressure on latch), replace plate and install lock back on to bag. Now, to remove bag from bracket just take screwdriver or knife blade and push against front side of latch. Holding latch with blade push bag backwards. Not the best way to fix the problem but it works for me!!!