Mouse operated turret mounting !

I’ve created a turret that is controlled using the mouse by watching a tutorial online, and I’m happy with it. I now want to mount it onto a vehicle/trailer so I can move it about, this is where the problem begins.

I am able to mount it using a weld or ball socket without any issues, but I am unable to drive cause the turret is frozen in place, if I unfreeze it, the whole thing just spazzes out and I have no control at all.

Any suggestions?