Thanks folks!
Lance, I don't always use the jig, but for something like this it's indispensable. I couldn't do it without being able to set it up exactly and test fit the struts, then turn it over and work from both sides!
For those following the rigging process, here's another small update.
I got the two rear cabane struts attached this morning, trapping the ends of the rigging wires under the strut ends inside the cockpit. When they were dry, I threaded the stagger wires between the wing struts and secured the lower ends.
There are an awful lot of wires leading up to the wing centre section and it would be impossible to secure individual wires without bunging up the holes for the others, so all the relevant wires were fitted and secured at their lower ends. The double flying wires across the front, and the bracing between the cabane struts had already been done, so that left the landing and drag wires. Once they were dry they were tensioned and held using dolls house clothes pegs. The jig was then inverted and CA applied to the lines where they entered the underside of the upper wing. (Easier said than done!)
That's where she sits tonight.....

During the fiddling around fitting the rear cabanes I managed to dislodge the pilot's seat and Aldis sight - it's not easy trying to hold the strut and locate the pin in the upper wing, while making sure the lower end is inside the cockpit - especially when the tweezers won't grip tight enough to stop the strut moving when it touches anything! Hopefully I'll be able to get them refitted fairly easily....
Ian