Taras - in PHRF NE there is a 6 second penalty for sails between 160-170. So you would be 141.
However the boat was designed for a 163 so the sheeting angles etc are all setup for this size jib so it is going to be the fastest and point the best, so I am not sure why people think the 6 seconds is worth it. I measured it with my sailmaker and a 155 is nearly 11 inches in the foot smaller than a 163. My sailmaker thought that was just too much to give up since the boat was designed around the sail.
David
#397