Entry level: Sliver can 540 (White pig)
Sunday joy ride: Team Poxer Sliver can with fan (white pig) or Tamiya sport turn (Black big)
advance level: Tamiya 23T super stock or Team poxer Black can with fan (Black big)
23T > TP black pig > Tamiya Black big > TP white pig > Standard 540 (White big)
Standard 540 = approx. 27T
** All of it is suitable for any F1 including F103 / GT /104/ HPI F10 & etc... **
Hope this help.