I'm going to buy either the Saddleman BR3400 bag, link >>> BR3400 Back Seat/ Sissy Bar Bag- Universal Great versatility - can either be used as a sissy or the H-D Premium Touring Bag, link >>> Premium Touring Bag | Luggage | Official Harley-Davidson Online Store My question is, for those that have some type of luggage system like this, how do you secure them to your bike? I don't mean by strapping them in. I am talking about theft prevention. What type of, if any, locking system are you using? If one goes into a store for 15 minutes how do you protect your stuff?