Ahhhhh not quite the answer to the Question..........
But looks like its a VFR trip to NZ hey Chuck! Who wants to be IFR on that trip anyway
.
Can always upgrade again if needed at the other end!
Plane will be 20Kg lighter and 5 knots quicker without it!
Actually...... hang as many drag devices on it ya can.....
(Everything in life is a race)