I first read this thread when it started, and I've just come back to it because I tried to try my "own mod of this mod", based on the initial comments that paper would not be very durable.
I decided to REMOVE the 'normally closed' pin (which I never use), and replace it with a chopped-piece of a regular plastic
cable tie.. It is plastic so its much more durable, and it wedges nicely in the spot where the 'normally closed' pin used to be, keeping it in place.
I never expected the thread to get so long-winded and technical though... all very good information, but from my perspective this is an (almost) free 'take it or leave it' mod that you can make (and subsequently reverse if you wish) to your cheap micros.
The micros I use here aren't genuine happ/cherries but you can see the similarities. By my estimation the mod I used halved the pressure required to 'click' the switch, reduced the 'click' volume by 70-80% and COMPLETELY removed the 'return click'. You can also seemingly modify the 'sensitivity' of the switch based on how far you push the cable tie into the switch.

Thanks to efjayel for a the original great tip!