[FrankJ]

The rules really don't address where you keep your practice bot other than not at the competition. You can go & harvest COTS parts off of it to your hearts delight. Just as long as they still meet the definition of COTs when they come into the competition.

Aside from the static 45 lb allowance, the manufactured parts on the robot are off limits just the same as anything manufactured in your hotel room, Build site whatever. Which means any manufactured items should be pulled before the competition, not selected from a larger set of parts during the competition. As with many things in First you are on your honor to follow the rules.