How do I replace the lower rotorhead?

[Grim]

Hello everyone.

I am a noob and need help. Could you please tell me how to replace the lower rotor head on a CX2? Thank you in adavnce for you help!

[mcnabbwr]

Turn the heli upside down and remove the shaft retaining collar bellow the gear set. Then pull the top head assy out shaft and all. Next the bearing assy will lift off the outer shaft, with that removed you can undo the screws holding the lower blade holder and replace it. While you have it apart consider replacing with cnc parts.