Vibration while using f valve

[TromboneWithDean]

Hi everyone. First post here, and it's about my new shires Q-series bass with axials. I literally got it 3 days ago, its that new. I love it so far, and I love how it plays and resonates, but whenever i use the f valve, it will cause a vibration. I've done some testing, and I've come to the conclusion that the cause is from the linkage. The lever is fine, but the linkage connecting the lever to the Thayer has a lot of movement. Not in the ball bearings though. It can just move side to side, and when it is held, it stops the vibrating. I'd include a picture but I don't know how too.

I've checked each slide brace nut as well, and as far as I could tell, it was not them.

Anyways, does anyone know how I could stop the vibrating? This is the first horn I've owned with thayers, so it's definitely outside of my knowledge right now. Any ideas would be really appreciated.

I also dont have access to a tech at the moment, but I will be travelling to another city in October, so I can get it looked at there too if needed (I hope not).

[JKBone85]

It sounds like the shorter arm connecting the lever arm to the top of the valve. Try putting tuning slide gel (something of a heavier viscosity) on the mini balls at either end of that linkage. Getting some heavier oil into the miniball casing should help deaden any vibration.