Good selection on the photos - that's exactly the Morro Bay Yacht Club location and sling I was talking about
. The stony protrusion in the background is Morro Rock. SLO Sails, for which the photo is an ad, supplies a lot of the local racers.
I might hoist a DSI by the sidestays, judging from GreenLake's description of his, but there's no way I'd support a DSII by the stock chainplates. I seem to remember that the boats I saw hoisted out were supported by two cables aft, maybe going to the spinnaker block attachments, and one cable forward - but I can't swear to it.