For adjustable lengths: I had gone ahead and invested in a system similar to this one:

http://store.catsailor.com/tek9.asp?pg=products&specific=jndrgpdmi0

I assume it is targeted at serious racers where any bit of extra leverage counts.

Once sailing with an inexperienced crew, the adjustable line became uncleated, and the crew went swimming. Of course there was wind and waves adding to the excitement. I now prefer the non-adjustable setup, avoiding worries about losing someone.

Bear in mind that the setup I was using only LOOKED like the one Rick sells.

H77