The 120%, 150%, etc., refer to the percentage of the fore triangle - approximately the area from the mast base to the bow and up to the mast head. Headsails are sized by percentages of that triangle.

For anything but the 110% working jib, all sheets go outside all the shrouds to the winches. For the 110, the sheets go outside the forward shourds and inside the other two.

The Pearson factory genoa track is placed too far aft for good sail shape with low clew genoas. Location for the 150's turning block is near the after end of the aft large window. The block for the 120 is closer to the aft shroud. Both tracks should be next to the toe rail. The factory jib track is usually too far aft and too close to the house.