Ok but can we say that if the piping happened to be in the wrong place (i.e. causing discomfort) it's because the helmet doesn't fit to your head in the first place? I mean..."fitting" isn't only related to the helmet shape but the overall construction to me. A "perfect fit" isn't so perfect if something, anything, is in the wrong place. I can't believe myself that I need to explain this. No insult intended dude, but it's how I see the whole thing. Whatever the reason...if it causes pain to you but not to everyone (only if you don't have a helmet from a bad batch, which could happen), it doesn't fit you. End of story. And I personally think that piping in the wrong place alone can cause local pain and discomfort but not a headache. And it's what fast4d was talking about I think.