Beneteau First 210

Swing room for pendulum

That is a difficult question to give an easy answer to.
First of all, in normal conditions the pendulum rudder only makes small corrections, say within 10 degrees of swing either side.

That would probably be between the rudders.

But extreme corrections may also occur.

The lower the system is mounted, the wider the swing can be.
The widest swing the windvane can create is just under 90 degrees, but the pendulum can swing further, depending on the movement of the boat.

But it is hard to predict what will happen in those cases.