Just to clarify, when you have a 6:1 purchase if you pull on the line with 100 lbs of force the system exerts 600 lbs of force on the sail. I know this is obvious but you never know questions people will not ask.

So, the "holding power" everyone speaks of is really what you feel on the line.

Also, the shape of the first pulley the line goes into will determine how much tension you need to keep on the sheet to hold it into place with the ratchet. As well as the torque the ratchet mechanism is rated for. I know on my system (I don't know the part numbers) the first pully "grabs" the line a little bit so I only need to keep enough tension on the line to seat it in the pulley when the ratchet is on.

I just wnated to make sure everyone is talking about the same thing.