....jeez I don't know..looks like a lot of holes. I considered doing the radius slots around the backing plate but I'm not that brave. Might be fine on a lightweight bike. Hey...all that work and you didn't drill the spoke flange? I got more weight off in the flange than I did drilling the whole drum side of the hub.
I didn't do it for the weight, I just think it looks cool, and it's easy with CNC.