To give some hints. I put the head strap on first, without the quest 2 attached, and make sure that's setup comfortably. You should have some added foam inserts etc (I bought extras due to a long narrow head). Then for me, I have the holding arms on the furthest forward slot that the screw goes into, and angled down. Then I place the quest 2 into the arms, and onto my head, with the arms almost completely tightened. Push the quest 2 onto your face until it's just the right distance, then tighten the arm screws to hold it where it should be, on the face, but still with the whole weight taken by the strap.
You should be able to use velcro straps to hold a battery pack on. There's one or two included with the headstrap I believe (one to hold the front foam to the headset, I took that one off, though may try adding it back actually). As you may have seen in my photos, I've actually left the vertical strap from the original on my quest, and attached it all the way to the back to the battery strap, as it helps counterbalance better in my mind.
Cheers Mate. What you say makes sense, so I will start all over again later
![Smile :) :)](/styles/default/xenforo/vbSmilies/Normal/smile.gif)
Yeah, I was thinking velcro straps. Just a little disappointed that there wasn't anywhere for a powerbank to click into.