Pre-fabricated parts for a practice bot

I'm not one for hypothetical situations, but this situation may become real next year for us.

What if you designed in CAD a robot base in the fall, built it, and then liked it so much, you decided to use the base in the next season. If you used the exact base you made in the fall for your PRACTICE BOT, would it be considered legal if you remade the comp. bot during the build season.