[On the roof]

It's definitely the ball joints. as soon as they tighten they bind when they are loose it's all free
Basically if you sit the car down on the table no wheels on
The arms hinge up and down perfect
if the arms go any lower than the hinge pins it binds

I had already cleaned the bulk head out with a knife to fit the arms its not that

I'll finish the build and have another mess with it 👍🏻