Got it! Thanks that is much more comfortable.
A slight alternative I ended up with while playing with the strap is shown below. It might stress the silicon of the holder a bit more than the other suggustions (so you could keep an eye out for possible tears) but so far with extended use I haven't had any issues. Something else to try if you don't mind your zebra light strap being inside out. Still fits my "relatively" big head with some adjustability and all of the hard wear is facing the right way as to not press into your forehead.
Well, in the end I decided to sell the H51 anyway, because I just couldn't get used to it. Even with bowz3r's trick, I couldn't wear it comfortably for long at all. I think the light is amazing and I love the features, but I have been wearing a Petzl for too any years, I guess, and couldn't get used to it.
Maybe one of SILVA headlights would satisfy you...