Reducing the height by 2mm and the volume by ~2500mm^3, I've refreshed the Coaxial8or R1 and swapped out the old nozzle heatblock for a CHC (that I tweaked from the CHC Pro CAD I already have). 

When designing the internal channels, I decided to play it safe and have every input the same. However, I'm now thinking that channel 8 could be like the image below without any drawbacks. If anything, it might help increase flow for that channel.