Thanks for all your replies.
I won the auction and have 5 gently used ACH, so that's a plus. One of them is an XL to fit my giant head , Megadeath wants the a medium, I may sell two of them.
I also bought a new Ops Core from TNVC, just to avoid helmet cooties.
Everything is hooked up, and now I wait for night time to take my first walk in the dark, which is silly, since I think it's a full moon night tonight.