Adding a spinnaker halyard
I prefer to keep the code zero hoisted (furled) when using the spinnaker. That allows me to switch from one sail to the other without too much work. This requires a second spinnaker halyard. The top of the mast has two sheaves on the forward side of the mast already, but there is no outlet to the deck. Z-spar does not like an extra outlet on the starboard side of the mast because there are so many already, which requires the new outlet to be made on the port side of the mast. But how do you go the the winches from there? The existing mainsheet footblocks on the port side are not accessible from below, and cannot be modified to lead the extra halyard to the winches via the port side of the boat. So I had to find a solution to exit from the port side of the mast, and reach the winches from there via the starboard side. I finally managed to find a way. Sea the pictures. It is not the most elegant way but it works fine. I installed an extra fairlead just in front of the winch, to avoid overrides. An override is where the line overlaps the line turns on the winch. This can be avoided by making sure that the line leads to the winch at an angle of approximately 8 degrees from below horizontal.
If you have a chance, install the extra halyard while the mast is still on the hard. Or at least run a mouse line. With a standing mast it is very difficult. You need to be a circus artist and gynecologist at the same time to run the halyard forward of the shroud connector bar and left of the forestay fitting inside the mast 1.5 meter below the top. You have a small hole of 5 x 5 cm in the top of the mast to work and look through, while holding yourself onto the mast. You can only go to the top of the mast with the mainsail halyard. So you have to wiggle yourself to the forward side of the mast.
The problem is that when you feed a mouse line over the sheave, you end up aft of the shroud bar inside the mast. So tape the mouse line onto the sheave and turn it until the mouse line exits under the sheave. Pull out about three meters and secure the remainder of the mouse line to the forestay leaving you three meters to work with. Attach a small weight to the end of the mouse line. I used some nuts (as in bolts and nuts). Lower the mouse line until it has passed the shroud bar. Still, you may find that your mouse line is just too far aft. Empty fuel tanks and full water tank help to tilt the boat and mast forward. Invite some friends to sit at the bow, on the side where you need to run the line. Once the mouseline has passed the spreader bar you can untie the remainder of the mouseline from the forestay and feed it until the end reaches the exit. It helps to mark the length you need to lower the mouse line such that you end up just below the exit. With a metal hook you can then pick it up and pull the halyard through. It is a frustrating boat job as it is so easy to do when the mast is down.
You also need a fairlead on the mast just above the forestay fitting.
The exit near the deck must be made opposite the existing spinnaker halyard exit, about 5 meters above deck.