4.5: Eligibility of models. Contestants may fly any aircraft which conform to the rules of the class in which they are entered and may share, borrow, repair or interchange aircraft components or complete aircraft as they see fit during the competition, providing the resulting complete aircraft conforms to the equipment requirements as stated in this section, and satisfies the provisions of Paragraphs 4.7.1 and 6.1.

Along with being maybe the longest sentence I've seen, it is the only rule I can see in the regulations that talks about what models you can use. There is no longer any reference that I have seen to just two models allowed.

If you can weigh only once per model for the Finals, if the first one is DQ'd, can you continue to bring more models?