To prep for C7 I was putting some finishing touches on my costume. One of the things I wanted to do is try to make it more bearable in the heat. I know some folks put fans in their helmets, but I was wondering what other tips you have to make it less hot. For example, I was thinking of cutting out a section in the back of the flack vest. I know it's not "screen accurate" (who knows, maybe it is!) but no one will ever see the back of the vest. Any other tips?