Well the headband went on my AiAiAi's but rather than bin them or sulk, I thought I'd produce an audiophile type helmet for my snowsports.
I started with the obvious measurements and trimming of the band, stripped the foam off the band and drilled some small holes. I then drilled small holes in the outer shell of the helmet (not through the foam on the inside as that is of course the protective part), I then pot riveted the band to the lid.
I then ground the sharp ends down and sprayed the bad boy mat black.
Sounds as you'd expect and keeps my ears toasty warm.