Well I emailed the Chief Pilot and got his thoughts. He just sent me a very simple response "Log the time PIC when you are the manipulator of the flight controls."

And I have taken an SIC checkride for 135 in the last 12 months, so that is a non-issue.

I think i'll end up logging it as PIC and it will come down to how good I can explain it in future interviews.

Oh and a random fact the caravan is a breeze to fly, could see people getting very complacent in that.