My vise jaws' edges are not smooth, so some stand-ins with better profiles helped me get the bends I'm after. Here are some pics of how I got the frontmost tab into place.
To stay consistent, I'm trying to keep hammer blows to a minimum. And while some seem to call for sharper hits with precise shapes, others want more forgiving pummels, like from a rubber mallet. I also found that putting an intermediate hammer into position against the piece and then hammering just the intermediary really cut down on mistakes. So, I used my square-faced shaping hammer for harsher strikes, driven with a ball pien; and for the softer, bigger bends, I fronted with the rubber mallet, driven by a dead-blow hammer.
It's surprising to me how clean and uniform these have remained.
Next comes cutting though.