Super Cub MX4 Micro EP 4-Channel RTF Airplane with PASS SystemRGRA1114 Super Cub MX4 Micro 4 Channel RTF Airplane with PASS (Pilot Assist Stability Software) System Like the original Super Cub MX, the MX4 is a great way for new pilots to progress their RC flying skills, yet is also a fun airplane for experienced RC enthusiasts to fly in tighter spaces. The MX4 is made from durable, repairable EPP foam with carbon fiber wing struts and tail reinforcements to help survive rough landings, and features an innovative