> A thinly veiled advertisement for Kraftwerk Tubes Did they test it on the Autobahn? https://www.youtube.com/watch?v=x-G28iyPtz0 https://www.youtube.com/watc

> A thinly veiled advertisement for Kraftwerk Tubes Did they test it on the Autobahn? https://www.youtube.com/watch?v=x-G28iyPtz0 https://www.youtube.com/watch?v=x-G28iyPtz0