This a video showcasing between no-Internal Weight/Dampener, the Internal Dampener and the Internal Weight in the Rama Works KOYU keyboard (RACE colorway)
Products used:
W01 Internal Weight
https://ramaworks.store/products/w01-a-internal-weight
W02 Internal Dampener
https://ramaworks.store/products/w02-a-internal-dampener
Compatible with the M60-A and KOYU (cannot be used at the same time)