Decided to mod the Higround Green Graffiti Keyboard (TTC Camo Tactile Switches) with some "Nanosponge" foam.
The sound improvement is subtle but noticeable. Type-feel is significantly improved with a more solid feel with each keystroke as well as less metal pinging and reduced hollowness. For sub $10 this is a great and easy mod with great positives.
May get around to lubing the stabilizers and 'tape mod' on another rainy day.