I ride the IceTech rotor and it works perfect. Never had any issues
That’s a nice looking uni!!! But that’s an SLX rotor and not the ice tech rotor, the ice tech have an aluminum hub that’s thicker:
http://www.amazon.com/Shimano-XT-SM-RT86-Rotor-6-Bolt/dp/B009XGH064
Hm, now I’m a bit confused. I bought it as an IceTech rotor, two years ago, and you can clearly see the tree layers: steel, aluminium, steel. But the SM-RT66s you can buy now seen to be non-IceTech and all IceTech rotors seem to have the thick plastic spider…
I’m most likely wrong about your rotor if you can see the different layers, shimano changes things so fast it’s hard to keep up. I’ve looked at the newer style ice tech rotors at the bike store and there is some variance on the aluminum center hub as well, that’s why I was curious about clearance. Some have a stamped aluminum spider while others have a machined(thicker) style spider. I ended up ordering an SLX RT66 rotor to pair with my xt brake because I know that combo worked great on my kh26.
I’ve seen an XT Rotor with the aluminum spider on a KH Spirit setup. It was 180mm rotor, KH Spirit cranks on a Flansberrium frame. I’m very probably getting an XT rotor for my updated spring setup 
The thicker side of the rotor is on the outside, the beautifully finished side is facing the frame.
My .02 but I’ve got the SRAM centerline rotors on my fat bike and like them so much that I bought one for my unicycle.
Sooo much quieter than my standard SRAM BB7 rotors I’ve had before. It’ll be interesting to see how it does on a uni.