Hi Jeff,

Are you saying you would like to use 3mm spectra for the the halyard an retrieval with a 1 meter section in the middle to have a cover for the cleat?

Hope that is not the case as the 3mm spectra would be way too slippery and hard on the crews hands. Unless you dislike your crew then that's ok

The way to go is to buy a 5 or 6mm rope with a dyneema core and pull the core towards one end leaving about 1.5 meters still on the cover. Use a fid to dig out the core about 450mm from the end of the cover. Push the cover through the core at the exit point to form your lock. Tapper the end of the cover over 300 mm section, basically cut one strand at 25mm intervals. Now bury the cover into the core. This will make a nice long bury and will never move.

If you have done it right the crew will have a hollow core rope to hoist the kite with and to use as the retrieval.

Recommend looking at Marlow or Liros ropes.

Do you need the length required?

edit: measured the one that came with the boat (ex factory boat) the cover is 14.2 meters, core 7.6 meters and an overlap of 1.1 meters. total length 14.2 +7.6 -1.1 = 20.7 meters.

effectively you need to buy 14.2m of your favorite dyneema cored rope.