I too am an enthusiast for keeping offcuts and finding uses for them. Here is a little gadget I made out of one last week:
[Linked Image]

I didn't fold up the offcut, I bought it in a load of scrap and just cut a couple of centimetres off across it for this job (a speed control for bench testing the small Honda GXV engines). I did end mill the slot though, mostly for fun. It would have been quicker to connect the dots probably.