My most expensive keyboard.
Driftmechanics Austin R3 Purple
Alu plate
Gateron Oil Kings L+F
Staebies
GMK Posh
Plate foam + case foam from stupidfish

Here is a sound test comparison of the board with and without foam.

With:

https://streamable.com/dow9fs

Without:

https://streamable.com/j2l9vi