i have one thats thin that makes that "wobble" sound when you flex it back and forth
and the other sheet that I'm working with isnt flexible, but if i put some muscle into it, i could bend it.
i dont really like using scissors/snips, because you have to bend away the metal thats been cutaway to get it out of the way.
i think with a saw at least some of that extra metal could be salvaged.