[virtuald]

As others have said, while the 'idea' of stop build day makes things more equitable in theory, in practice well resourced teams ignore it completely by building a second robot, thus disadvantaging lesser resourced teams.

I would like to see a happy medium -- have a stop build date something along the lines of "no major physical changes after this day", but still allowing driving practice and other minor changes (eg, you can fix things you broke).

Obviously, this is impossible to enforce, and people will lawyer it, and the details are tricky to get right.