Just to pile on here:
If you look at the deck just forward of your aft winches, you'll see that stainless T-track -- that's where your turning blocks should be. The turning block is what keeps the sheet leading into the winch at a fair angle to prevent overrides. They may have been removed at some point by a PO, but may be hiding someplace on the boat.
See if you can find something that looks something like this:
It slides along the T-track, allowing you to fine tune the shape of your foresail at different points of sail.