996, looks great.
I am with holdmybeer/hfarr tho that if i was going to do it, I'd remove or modify the rear cupholders and use them as the mounts. iirc nautty does something like what he posted up for theirs but I don't recall what I saw when I was at the dealer a few sleeps ago.

I wish I would have built something like this for the vegas sun. it was brutal in july and we typically pulled off the water by 1pm as it was too hot to sit anywhere but under the bimini or in the water. rear seats and sundeck were all but off limits and the gator on the floor was unbearable without socks on.