Why I will get detained at the airport...

I have been preparing for my journey and one of the things that has annoyed me about flying is that you can never use your own headphones in the plane. I recently bought a pair of Sennheiser CX300 and they are fantastic, if you do not want to hear your environment (they do have an annoying thump when you touch the cords...but that might be the topic of another post...) and would really like to use them in the plane. So I soldered myself a airline-to-stereo mini jack and because the headphones are soooo sensitive, an in-line volume control. I fear that I will get detained at the airport. I hope not, but I will keep you informed. :)

Update: I made it through the security check without a problem, I guess they are used to seeing the inside of electronics. Whats more, they let me through with my SwissCard. :)