The other day where I fuel up there was a nice red extended cab Durabux truck, what I found humorous was that the truck was pulling a trailer which had an identical NEW Durabux truck on it. I turned to my buddy who is an aircraft mechnic and said look it that a Chevy and a spare Chevy. He laughed as in the aviation business when you have unreliable equipment to have dual redunacy. Hmmm what concept take your spare rig with you in case of break down! I believe in spares, I have a birddog and a spare birddog. When I go hunting I take a spare gun along.