RE: MX 400
probably one of the best micro heli to train on (well its barely a micro heli). cyclic isnt as aggressive as the trex.
there are a few issues with the x400, so make sure you do the FIXES before attempting to fly it. they are CRITICAL and will cause a major crash if ignored.
start by boiling all the white plastics for 20-30 minutes and CAing the swashplate so it cant separate.