Hi
My Shoei raid II just fits if you put it in right - on its side, top facing backwards so the curve is over the new attachment protrusion into the box. You still need to flex the lid a bit
My girlfriend's nominally smaller-size HJC something or other won't fit.
I used to have the older box and it was much easier to fit hats in - but it was cracked and likely to fall off. I would not even consider buying off ebay unless it was the latest design. I believe there have been three designs at least. I never saw the middle one, but I would never put my passport in the first design, dirty pants maybe, but not something I wanted to keep.
Darren