I use a long hasp key lock for the helmet, and a ski type retractable cable lock for my coat, and run the cable through the sleeve, etc. If the weather is warm, I don't feel like wearing a 3/4 length padded ballistic jacket around a store for any length of time.
I lost a disc lock last week that somehow managed to back a nylock nut off a sissy bar mounting bracket somewhere between CT & Canandaigua. If anyone found it, let me know and I'll send you the keys.
