I'm going to give you a jewel of wisdom I shared in our rookie workshop at Kickoff: you may not be able to win a regional just off drivetrain alone, but you can certainly
lose a regional just off drivetrain alone. Get the AM14U3 driving, and
shake it down. (Maybe not that violently, but drive it over things and make sure nothing rattles loose mechanically or electrically.) If nothing else, you don't want to be pegged as the team that blew a tower capture.
