X-34 Landspeeder – 80mm – 2021 – LIST X-Jet – 81mm – 2021 – LIST XS-IVE – 76mm – 2001 – LIST X-Steam – 80mm – 2015 – LIST XT-3 – 80mm – 1985 – LIST Xtreemster – 82mm – 2004 – LIST
