Battcars!
I installed the Harken system on my 35.5 to reduce friction, I even used the ball bearing luff cars in-between the battens. It totally eliminated sail related friction. My problem however, was caused by no sheave(pulley wheel)on the axle at the masthead coupled with a halyard that was neatly wrapped(by my local Hunter dealer) around several components inside the mast! I didn't fully understand the problem until after I sold the boat, but the new owner is going to get it beat soon. My current boat, a 40.5 benefits immensely from having battcars on the main. It doesn't have luffcars yet, but with it's properly reeved and smooth running halyard, it is a bunch easier to handle than stock. I have the luxury of having an electric halyard winch as well, making hoisting a breeze (so I have no excuse for not stopping for a family swim), but having the battcars makes reefing and dropping the main a simple exercise from the companionway(I ran the topping lift into the cockpit). In fact,if I am not careful, the main will actually fall too fast! A quick trip to secure the sail ties and fasten the cover and I'm done. Having the Harken system presents no hassles or maintenance problems at all. The only drawback is cost. But I feel strongly that since my wife and kids can easily drop the main if I happen to be over the side or incapacitated, coupled with the fact that I will now agree to hoist and drop several times in a day for whatever reasons my family can come up with, make it well worth it.