Gordon, Many of these installations require
some custom work by your sail loft. The amount of UV protection you desire sewn onto the jib and the heigth of the foot on the jib also must be considered.Before any final plans for the jib sail size are committed too you should;1. Mount the roller furling equipment to the boat.2. Then have all the standing rigging systems tuned to factory and equipment manufacture specs. These tuning procedures might require remounting your furling set-up. To just mount the furling system where suggested can be a total wipeout. I found that on my H26 I needed to make a major change to the furler to correct improper mast positioning. The earlier set-up made the boat dangerous to sail in heavy wind, just to make it easier to route the furling line.After all the geometry is correct for the mast, it's rake and bend, then you have the sail modified to fit.With a later model Hunter 23 or 26 the jib size is somewhat limited by the shrouds and the jib rubbing on these. My understanding is that 110% is about as big as possible without other changes. B and R rigs gain their power from the larger mailsails.RayS/V SpeedyPS. The disagreements about jib size leads to lively conversations, but the costs can also be high for being on the wrong side of the idea. Research well and then plunge.