No more components built today, but I decided to do a dry fit to see how everything goes together in case I need to do some fettling and also to see where I need to be careful as the build progresses. For example, the bare plastic strip that remains on the cockpit floor, where I masked to avoid getting paint on the join between the floor and side frames, is slightly too wide. I resolved that by shading carefully with a brown pencil up to the floor paint, so that the thin line of bare plastic will be hidden. I'll try and get a pic to show this later.
One of the known problems with WNW Sopwith models, is the lower wing fit once the cockpit is assembled. Here you can see the lower wing fit - the joins circled are as close as they can be, and the tiny gaps close up even more when I push the parts together. The join between the wing component and the fuselage underside may need filling to hide the seam, but the way the wings themselves sit looks ok.

The other photo shows the top cover sitting a little high (blue arrow). I think there may be two ways of resolving this: sand a little off the cowling edges (yellow highlight) to give a little freedom of movement, or sand the top edges of the ammo box and instrument panel - as they could be pushing up the panel - alternatively I could adjust the fitting of that assembly a bit lower, say 0.3 mm to give the same result.

In handling the components the control column has been dislodged, but I should be able to re-fit that carefully.
The difficulty is each time I fettle with something the re-assembly for another dry fit check takes time.