Hi.
I am not an expert here... there are others that may know more than me, but I have owned three boats with them, and one with in-mast
furling.
Don't just run to the inmast. It is easier than the LJ, but it has mixed results in a blow which could be dangerous. I have also noticed getting a lot better performance off of a "traditional" main system. I have the inmast now and like it, but if I could go back I would go with the
Harken Battcar system or a in-boom
furling. All that being said:
One responder said that the previous owner may not have "trained" the sail. That is my experience too. It takes a little while to make it flake like the pictures (and other experienced boats) flake. Here is how we did it... my wife would slowly drop the sail and I would stand about 1/4 way down the boom and force it to each side. We slowly dropped it, not fast. After a while, it set it.
Second, Try incresaing the tension on the LJ's. If they are too lose, the sail flops all over the place. If they are too tight, it will not lay out properly and can damage the gear. We set them where they would just barely loose when the sail was up but tight enough to flake the main when dropped. Incidentally, they will loosen over time and need constant maintenance.
Only drop the main when you are dead into the wind. The hunter 420 has a huge main... if it is blowing off the beam, your sail will follow off the boom. We also tied it off as soon as it hit the boom for that very reason.
What we hated about that system was the cars getting jammed in the track. Lubrication helped.
Harken makes a good product... I think it is called Sail Lube... or something like that. They carry it at West Marine (it is expensive though, in my opinion)... keep your track lubricated as much as possible. Sorry I cannot remember the name of the lube, I do not use it anymore and the memory fades quickly with kids.
Hope that helps. I always found a little bit of swearing and beer made it look better too. Of course, I am sure I am the only sailor that has cursed his sails... well, maybe...
Take care. Fair winds.