Loose rear arm

[Altair]

I have a mavic pro that sometimes will vibrate. Tracked it down to the right rear arm not fully seating in the deployed position. I have messed around with the set screws, but have not yet been able to resolve the issue. Has anyone else had this issue, how did you resolve it?

[Frank Adams]

Have you removed the top cover yet and had a look? I was thinking there was another way to secure it from the inside.

Btw, you probably already know each rear arm has 2 allen screws that are on the outside.

[HenryAlisy]

There are two different types of arm rests for these beasties. What year is yours?