Thanks!
But thats not quite the behavour I'm after. I want there to be a hard limit where its impossible to turn past, not a value you can go past and drift back from.
I've tried using the disable() function in the Dragupdate when it goes past a certain angle, which does stop it dead, but then you can't drag back again into the area within the limits.
Feel like I'm getting close, but suggestions appeciated.
Where do I download the 1.11 preview you mentioned?