[JackFisher]

If your ever in a pinch to make em quickly, (let's say at a regional and you have to completely change can grabber geometry via new gussets designed at the event) you can cut out a profile that lines up with the edge of the tube, use tube without holes already in it, fixture the assembly together with clamps and then drill and rivet one hole at a time along the entire gusset. This isn't very efficient and should only be done in a pinch, but it is easy because you don't have to worry about the holes being precisely located. The key part though is to drill a hole and then rivet, because the plate can easily shift during drilling and then the holes wouldn't be aligned.