I do run the wilcox wired setup. Don't really use the buttons though. Live in somewhat rural area so no need to kill them quick. Sometimes when I'm walking out of the woods into a lit area I turn the switches on the units off and then hit the buttons just to be sure, mainly because they are there.
Different brand arms also impact how close or far the ocular sits from the face. I have never owned anything else and have no complaints about mine, but for weight/counterbalance I have wondered how much it would impact the feel of the helmet on the head if I had different ones. Ex: J arm that has ocular a bit farther away allows the G22 (in my case) to be run a bit closer in to the helmet reducing leverage. Just been too lazy/poor to try it out.
The Mod Armory arms have the dovetails more centered on the device. I don't know if they will snap into the wilcox sockets though. If the spring loaded tab that locks them in is in the front they should work. If its in the rear like a knights Jamr and I'm assuming the bridge it might not work.