Like Don, I don't have much experience in soldering. I've done it on simple bits but keep having a problem when the piece gets too many joints and one melts every time I try to add another.
I've also done the CA and find it works most of the time, but sometimes even those joints can be fragile (I've lost one of the 20mm locking frames because of a joint letting go).
So an idea I've been thinking of is to use two different sizes of brass wire (I think Siara said they should be two different sizes anyway) and drill holes in the larger one that the smaller wire would go through. Brass is soft enough to drill quite easily.
I've never made a railing this way, but I've made many other parts like this, so I think it will work. My main concern is getting the holes lined up well enough to make it look right. There's a lot of holes that would have to be drilled, but I think I could alternate hole/CA, hole/CA to cut down on the work.
If it DOES work, and you're not in a hurry (it might be a while yet before I do them, and I need the kit railings to take measurements from), then maybe I could send you the kit railings?