Today my O-Rings arrived.
Here is a little Video which compare #ErgDox
with, and without the O-Rings.Only thing:
If I firmly press the O-Rings to the ground, they not have any effect. But if I flip them over the CAP, and press the CAP firmly to the ground, the O-Ring takes some noise away.
Will see how long this work, or if the key get louder after some time.
Maybe better try a litle bit thicker one than 5,00x2,5mm. Maybe the 5,00x2,6mm (http://www.ir-dichtungstechnik.de/shop1/product_info.php?products_id=2646
I have turn up the loudness on the video by 500%, so you can better hear the difference.