With exactly a two-hour layover in FRA, is there enough time to go out and get the Easypass registration done? Between the lines of people trying to move from Schengen to a US-bound flight (and going through passport control) vs. just walking out, register for Easypass and then come right back in... Any thoughts?
The only piece I am worried about is how long will it take for me to get out landside at FRA...