@alexonit Thanks mate! Ah cool, now I'm curious, what did you make? :-)

You used the rubber hammer to fold the metal, not to set the rivets, right? :-? I glued cork on my wooden mallet some time ago. This worked quite good for bending. But rubber might be even better as it is a tad softer. I will try this next time, I think I have one deep down in a drawer somewhere.