Congratulations on an exceptionally well built model - don't drop it!
When I first became involved with rotary wings the two main types were the Sycamore and the Whirlwind and their main rotors turned in opposite directions. When I was allowed to play with them - under strict supervision, of course - I nearly always forgot which boot to put in to stop the yaw as I pulled the power in (power in the Sycamore was of course a virtual concept!). Ever after I always look at model helicopters rotor blades first to see if they've been put on correctly - a bit of a bu*&er when the Chinny turned up!
Old Duffer