Does the strap include a counterweight? I see the battery elite strap weighs 179g, but from memory the HMD weighs over 500g.
I wrapped a couple portable batteries (they're dense) in a bag and tied it to the back of my basic strap, and I don't even need to tighten the strap anymore, the weight is mostly pushing down on the top of my head now. It's an incredible difference, to the point that I'm offended they don't include a counterweight by default. From memory my counterweight is around 350g.
Maybe you can try it out by loosening the strap and using a finger to tug down on the back of the strap, and see if it balances on the top of your head and feels good.