Play in main shaft

[Paula]

Hello.
I had a little crash that required me to change the main gear and the elevation servo. I also took the opportunity to fit some Rakon bits too, only because i think they look cool to be honest!
I've noticed there is about 2mm play up and down on the main shaft. Is that normal or should i move the top collar down a bit to reduce it as much as possible?
Here's a link to a video.
https://youtu.be/-nKtd0vvNIA
Thanks for your help.
Paula

[stargazer]

It shouldn't be like that Paula,you do not really won't any up and down movement.Try pushing the main gear upwards while pushing down on the main shaft collar,then tighten the collar.

[Paula]

I loosened the collar and pushed it down and it clicked into place!
Thank you. It all runs super smooth now!
Good job i asked!