It would be useless to convince conspiracy theorists, because one of the bases of the conspiracy, is that the government is messing with the evidence. If the government did what conspiracy theorists think they did, they would have no problem to corrupt the experimenters…
sources:
… and do the same thing they did with the actual buildings, with the small scale buildings.
Two replicas could be built. One could be packed with concealed nano-thermite to be detonated at the time the originals collapsed after impact. Then the results could be compared.
If the results were the buildings never falling and only falling like the originals if thermite was used, and if then an investigation found key world players involved. How would the events play out and would it lead to negative outcomes or positive outcomes overall.
Regardless of the outcome of this test, there will still be conspiracy theorists that will claim that the test preformed was somehow initially biased. Henceforth, additional testing will be rendered rather ineffective.