I can understand your desire to be discreet, especially in this age of overly-paranoid, under-trained "security" guards, but ... looking at that key fob kit, it seems to me that hauling something like that around would attract MORE attention, from all the clanking and jingling if nothing else. I would join PC2K in opting for a mini-PSK. That's one reason my Altoids tin doesn't have any paracord wrapped around it, just a discreet layer of electrical tape around the edge to seal it.