They can mock one up and it becomes real. There is still the problem of capacity planning. They can only complete at a rate of their slowest part. That is the whirly wheel. How long on one of those things will it take for them to know the direction of north? I think two days before they have to fake it or go PTS. So they can only get people through the programme at the rate of one every two whirly wheels per day. They won't be able to afford to run the place on that basis.