I have a M6.0 and my sail is a pain to raise too. Two things, Make sure the blocks are working properly. My lower block froze making it difficult to raise. The other is the luff of the sail has or should have a curve in it .Lay it out and look down the luff and you will see what I'm talking about. Its hard to raise because your pulling a curved shape into a straight shape. I use a easy right or wrap the halyard around a rigging tool and use that as a handle to help pull the the sail up.