I'm using Elite Strap with battery since several hours and find it very comfortable and well balanced. However it makes some noise when moving the head, mainly plastic cracks noise and the wheel used to fix it is also moving making some distracting noise. Do you have something similar ?
It's discussed here as well. As one commenter said it seems to be hard plastic on plastic noise. If the attachment parts clip on hard providing enough grip maybe Kleenex or rubbing on candle wax on the contact points might work without the attachments slipping off.