That SOD cover looks decent, but probably won't work with the ARC. The Crye mesh helmet cover is an interesting concept, one that should be explored more. Instead of installing the helmet cover and installing all the accessories over the top of it (I can never get the cover to look just right with the NODs mount, its always scrunched), why not install all accessories on the helmet, cut the cover to fit around the accessories, and then fasten it with velcro? I might try this with the ACU cover.
And why do I buy coyote gear instead of ACU or MC? The Army can't make its mind up about patterns, and I'm not buying 2 of the same rig just so I can make sure it matches. Isn't color-coordination an airsoft trait?