[GaryVoshol]

FIRST also has to plan when doing back-to-back usage of field elements. Striking everything on Saturday night, getting it into transport, and then setting up again on Wednesday is a big task.

There will be 10 field sets in use in North America in week 5 (9 regionals, 2 fields in Toronto). Having a low week 4 gives FIRST added opportunity to get all the fields into place.

I'm sure the biggest factor is site availability.