Happy holidays and thank you for the detailed feedback, Farkas and Lugia!
I will definitely think things over, and make some modifications. One of my goals of moving to a modular setup was to have most items contained in the eurorack case, whether its the EP-270 or a larger option. However, that was probably not possibly in the long term, as I would eventually like to incorporate my Roland SYSTEM-1m and Arturia MiniBrute 2 into the setup as well. With that said, I will definitely consider keeping the drums and synths out of the rack.
I must admit that the EP-270 is smaller than I had anticipated once I started adding modules. I will more than likely move up to the EP-420, and fill it in over time.
In regards to the Blck_Noir vs. RD-8, I actually owned an RD-8 and sold it, due to having the 808 sounds covered with the Roland TR-8S and, via samples, Pioneer DJ SP-16. The Blck_Noir was selected to obtain sounds different than the typical 808 and 909, or any other drum machine option I have available in my studio.
I will post an update over the coming days.