@tw_sjo I did a similar action to @dormos , bending the tangs that fit into the doors. This removed the banging, but does mean extra pressure is needed to ensure the frame does not rub on the bodywork when opening and closing the doors. An amount of "bend, test, re-bend" is needed to get the best fit.
I also bent the frame's front bottom corner in slightly to reduce the draft created on the leading edge (by the quarter-light. This has additional benefits of reducing the amount of rain driven into the cockpit and reducing wing noise.
Hope this helps.