DIY LED layout on a 20" cube???

[nerdz]

I have 20" cube, so far I have a 20" heatsink, 12xRB, 8x XM-L NW, 2 x Blue , 6 x UV, 2x Red. 80 degree optics. 3 PWM drivers to be controlled by Reef Angel.

Have no idea what length to machine the heatsink down to. Also have no clue on LED mix and layout... My Biocube8 is evenly spaced, but has no optics and only 2 colors. No experience with a bunch of colors and optics?

To make it easier, I labeled pennies, ha ha!

I just randomly cobbled theses together... Would one big array cluster be okay, or two separate ones, (radion-like)

1 Large Arrray:


2x This array: