Thanks for the comments gents, much appreciated.
Not much in the way of photogenic progress, but progress is being made. I spent this afternoon drilling holes....40 in each of the upper wings! Lower wings still to do.
I also had one of those "eureka" moments....I was trying to work out how the ailerons were rigged but couldn't for the life of me see how they were done. Then I reread the Datafile and one single sentence led to the light coming on - it referred to the prototype 184 which had ailerons on the upper wing only and no return spring so they drooped when the plane was sitting on the ground. This caused too much drag during taxi and the takeoff run so bungees were fitted to return them to the neutral position - the comment was made that they then only had downward movement - that was the key! Even when the ailerons were added to the lower wings they still only had downward movement! There is one single control line exiting the cockpit just behind the lower wing hinge and running along the upper surface of the wing to a couple of guide wheels by the mid and outer rear struts which angle the line up to pull the upper aileron down. This aileron has cables attached to its upper side which run forward to the leading edge, down through both wings and back to the underside of the lower aileron. Thus when the upper aileron is deflected down, it pulls the lower one down too! There are 2 bungees connecting the top of the lower aileron to the upper wing which then pull the lower aileron up to neutral when control pressure is released, and through the same linkage, therefore pull the upper aileron up to neutral too! Very simple, but it took me a while to figure it out...now I can rig them correctly!
Ian