Why don't you use brass for the internal weight? Seems like a waste to put more alu inside of an alu board. The whole point of an internal weight is to have dissimilar materials to affect sound.
Thank you for this question. While brass is commonly chosen as a material for internal weights in keyboards, the decision to opt for aluminum in this case was influenced by several factors, including design considerations and cost.
Given that the MKC series is positioned as an entry-level customized keyboard, which can be easily purchased, it's more economical to use aluminum internal weights. Moreover, Aluminum is preferred for its lighter weight and durability. This is also an advantage for people who frequently travel or carry their keyboard.
If you have any more questions about MKC65 please feel free to ask and I will be happy to help you.