A Busy Boom
The control connections on the jib boom are designed so the boom and jibsail are separated for transport. The boom is taped to the deck on a pad. The topping lift is not removed from the boom and resides in the keel.
The boom construction and fittings are the same as those for the main boom. However, the stiffening sleeve extends only up to the mounting ring for the forestay. Forward of that is counterbalancing lead. Additionally rings are added, moving aft, adjuster for the downhaul, the topping lift, the jib sheet, outhaul, the sheetline guide and finally, the aft end guide for the topping lift and clew line. the clew is restricted from lifting off the boom with a line loop and hook at the grommet.
The Upper Forestay Standoff
This is the kingpin of the jibsail and boom positioning. It can be of wire or line attached to a tang at station 92 and terminate with a hook. The jib headstay, the forestay wire and the topping lift line are attached to the hook. In that this has been done before, one knows this is a "Soup Sandwich" till all the connections and alignment positioning is determined. The topping lift line should be vertical and parallel to the mast. The boom, at the swivel, should orientate parallel to the deck and slightly lower than the main boom at the gooseneck. If this has not been experienced, this link to the EC12 site will explain the process here of turning a "Soup Sandwich" into "Quiche."
Once the first jib is in place the set up for other jibs is easy. All you have to do is overlay the new jib with a wire in the luff with a loop for the standoff. Make sure your mast is straight and the good tension on the backstay. Install the hook for the forestay mount on the boom and snug it up real good. Now remove the first jib (you will need to loosen the backstay) and install the rest of the lines.