[Oblarg]

Place me firmly in the group of people reading this rule as "you must select a set of pre-fabricated parts weighing at most 45lbs prior to competition, and that set cannot change while you are at competition."

If you could not, if asked, state at the beginning of the competition which parts on that practice robot are in your withholding budget and which are off-limits, and if the allowed parts don't weigh under 45 lbs, I'd say you're in violation of the rule.