I would say that they should receive an extension of any wheres from 1-2 days at the most. Why? Because they are a rookie team. Yes they can read online about how to put together the gearboxes and frames and read all of the schematics for the control system, they still will not be able to build it/put it together in a couple of hours like some veteran teams. However, I don't think that they should receive a full 11 days. As like what was said before, the first two weeks are usually design only. How many of you teams were stuck in your first few weeks in your rookie season?
But being an international team does have its drawbacks, I'm sure that FIRST ships out the KoP's with enough time to make it to the teams and enough time for customs. They cannot control customs and therefore while competing internationally, expect delays like this. Consider it a side-affect of international FIRST, it is a risk that you are taking.
So 1-2 days to have it in the crate would be my inclination as they haven't lost too much time with the critical parts in the kit. If this were 2008 or 2009, then it would be difficult as the orbit balls and trackballs were critical when designing the robots.
Good luck!
