#1039 is working perfectly. The ARC4 is one of the best illumination products in the world. I believe, once the bugs are worked out on the Rev.2, still no other hand held light will be comparable. Twenty-five percent of my daily job is working in the dark. Having User Settings capability for a flashlight seems unheard of except in a science fiction novel. I feel special to be in dialoge with others regarding ARC's great products. Kudos to the ARC family and all CPF folks.