Since the trust was not creating a replica of a Peppercorn A1, but the next in class, the proposals were duly considered. The trust decided it could adopt only some of the proposals, and the improved "Tornado" remains strictly a first-generation locomotive. The trust felt there were too many risks in adopting all of the untried proposals, and in Porta's own words, it would have taken 20,000 test miles to iron out his improvements, something the trust probably could not finance. The expense of testing the heavily modified preserved "Duke of Gloucester" was also cited as a factor.