Just my personal experience, but I had a 3/8" Mastercraft Maximum torque wrench where the locking mechanism started to come apart (spring for the locking ring poking out of the handle). They replaced it without a receipt, no hassle (which I had, I just didn't find it until a week later).
I also did manage to get my father's Sears Craftsman torque wrench replaced without a receipt, but there was a lot of humming and hawing about it.
i'm glad you posted your experiences, this just proves that the specific stores are the real problem.
There's 2 Canadian Tires in close range to me, one is like hell, one is like heaven, unfortunately hell is about 4kms closer than heaven.
I have a Mastercraft floor nailer, can't find the receipt, neither store will do anything about fixing or replacing it, not even one of the guys in head office can help me.....(you know who you are you bastard).
I've only been dealing with one Sears store, there's a lady in the hardware dept thats been there for 30years, she's the pinnacle of customer service, and i'd bet she knows more about tools than most guys here.
If it says Craftsman on it, she takes one off the shelf or orders a new one for me, with a smile every time.
I've evn asked if i needed my receipt, she said the same thing i say, no one else sells Craftsman tools.
Common sense, just seems to be lacking alot these days....