Glad to hear velcro worked for you, I used it on a lot of other parts. It actually wasn't too bad. I cut vent holes in my helmet, then wired in 2 seperate fans. So I could turn one, or both on at the same time, they weren't loud either, so it worked out rather well.
What I did was get a velcro loop around my belt which is hidden under my belt armour and attached it that way, I hope it works out lol I might do a test run soon
When you went to the con was it hot for you?
it was hot for me having just my helmet on lol