Great review
Only having 6 and 110lm is quite a big jump on paper, is it actually an issue in real life use?
The headlamp adapter is interesting. You showed it rotating a bit, can you mount it on the front of your head or will it only go on the side?
Including information about the strap tension was really good
I prefer stretchier ones because it makes it more likely that it will work on my woolly hat without needing adjustments from without-hat wear.
I can see having a magnet in the tail being really useful, I may have to see if I can add one to my H52f.