ArtMetal

I agree that the ways mentioned would work but I would go about it differently. I would bend the side strip around a former and then, if I wanted sharp corners, file almost all the way through using a square needle file. I would run a solder seam down each one. You can make tube rivits which don't take much force to bend or you could solder a wire of the proper lenght and gage to the inside, put it through the outside hole and then pein it. The Complete Metalsmith does an excellent job of explaining things like this.

marilyn