Funny timing. Was just wrapping this project up today. No pictures, but will describe it.
On previous boats I made a cover that utilized tent poles that arched over the cockpit Conestoga wagon style. Couldn't do that on the C34 because of the topping lift, back stay, and lazy jacks.
On Noeta I took two pieces of Sunbrella. Three of the sides have your basic grommets in the corners and about every two feet. The top has nylon webbing loops with small carabiners clipped on. The 'beeners and loops were installed to clip to the back stay, topping lift, and the first set of jacks. The bottom aft corner clips on to the end of the push pit railing. The other grommets bungee to the life lines.
I set this up as two separate pieces. That way I can put 1/2 up as a sun shade and leave the other side open. When both are up there is a gap between them where rain can come in.
I'm only dealing with the rain on the aft portion as the very little rain will come in where the shades rest against the main sail cover. That section is also above the dodger.
For the gap in the back (boom end to back stay) I've installed the female half of twist locks on the Sunbrella. To cover the gap I'm trying to find some opaque flexible plastic (think flexible cutting boards) I can put the male ends of the twist locks on. This will block the rain, but also allow some diffused light in if we end up sitting out a rainy day at the dock.
If interested I'll take pictures when it's done.