Lock Turret While Driving Switch

[Schmack]

I would like a switch to lock the turret in place while driving the SRV (from the turret). If there's already a game mechanic that allows this someone please let me know. I've looked around the controls settings, haven't found anything obvious. It would be nice to be able to drive the SRV from the turret without needing to be able to think in multiple dimensions at the same time. Then, when my SRV is stopped, I could release the turret lock much how the hand brake is released.