As to the Hobby's retractable undercarriage, Don Brown said that F.G.Miles 'decided to farm out its design and construction to a firm specializing in that work'. It was considerate of him not to say who the specialist firm was - having regard to the fact that the undercarriage it designed wouldn't retract into the wing rebates designed to accept it, which deprived the Hobby of the chance to compete in the 1937 Kings Cup race.
It appears that, by default, responsibility to post the next challenge falls to wub.