I wouldn't be surprised ithey start supplying tethers with every new bike they sell; a nice 20' chain and lock, so you won't get hurt riding too far.
Never heard of a magnetic bag flying off yet.
Let us know how you like the bag after you have used it a while. Can'timagine that you didn't get a Nelson-Rigg!! :-D What's wrong with you guys down there in Texas anyway?????????????? :-D :-D :-D
Monte