The Luff wire is the forestay. when it sags, it allows the furler to get out of alignment causing it to rub per your sketch.
If you tighten the main sheet it will straighten the forestay and should clear the furler.
The C14 has a round bottom & is pretty "tender". That is, it heels and capsizes fairly easily when not balanced by the skipper &
damn! misspelled vise.
Note, it also helps to bed the assembly in 3M 4200 adhesive before re-bolting. NOT 5200 which is too permanent.
Remove the steel cheek plates and center board assembly. Straighten the plates (vice & hammer).
Replace the board and plates assembly and make...
I have all the stock C14 hardware (see C14 handbook) including: Drum swivel, forestay, top swivel & pennent.
It is all in excellent...
For used sails photos send a PM: firstname.lastname@example.org
Do you have complete boom vang tackle? Price?
805 371 4851
The Roller furling jibs come sewn onto the forestay wire. They are also fixed to the swivels at the tack and head grommets with...
To create accurate polars I think you need a lot more than accurate boat speed.
For a given wave condition, I think you also need accurate true...
For drum, swivel, and pennant, and forestay, call Ross 805 371 4851.
taking on water
Catalina advised that the leaking is almost certainly not at the gasket attachment.
But worn or missing gaskets can direct water...
gybe single handed
From an earlier post I see you have a tiller tamer, so the only thing I would add is to make sure the center board is down...
The wire pennant will reduce the amount of line required.
With 4to1, you save 4 inches/feet of line for every one of wire.
Separate names with a comma.