G'day Monoxide,
From what I have seen, curved spiders are
I have seen a really rigid one made from a couple of steel rulers
I reckon you are better off making your own primary mirror cell. The GSO one is a 9 point design but if you run the data through PLOP it appears for a normal 12" mirror, a 6 pointer is better. it also will allow you improve on the edge supports and retaining clips.
Re Moonlite connectors, I was going to use them on my 16" but I ended up making my own. I used the same design on the 8" for Phil Hart and I will be using it on the 10" scope. Works well and cheap as...... I have attached a couple of pics of the 8" scope that show the general arrangement.
Go luck, I will be following your thread with interest.
Cheers,