baɪ nˈaɪntiːnhˈʌndɹɪd twˈɛnti nˈaɪn hiː bᵻlˈiːvd hiː hæd sˈɑːlvd ðə wˈeɪt pɹˈɑːbləm, baɪ jˈuːzɪŋ kˈæst mæɡnˈiːziəm ɪnstˈɛd ʌv stˈiːl, ænd hæd ˈɔːlsoʊ mˈænɪdʒd tʊ ɪmpɹˈuːv ðə dɪzˈaɪn ʌvðə sˈuːts dʒˈɔɪnts baɪ jˈuːzɪŋ ɐ tɹˈæpt kˈʊʃən ʌv ˈɔɪl tə kˈiːp ðə sˈɜːfɪsᵻz mˈuːvɪŋ smˈuːðli.
By 1929 he believed he had solved the weight problem, by using cast magnesium instead of steel, and had also managed to improve the design of the suit's joints by using a trapped cushion of oil to keep the surfaces moving smoothly.