Thanks Kevin. I sympathise entirely. Well, here's the latest progress I've made to date.
Photos 1, 2 3. the cannon gondola and underwing rads and covers have been added. The rads went on without too much problem. There was a little filling required on the fit to the nacelles, but nothing too bad. They had already been test fitted to allow for the dropped flaps. The gondola was more of a problem. First the instructions aren't too clear as to where the cannons attach. There are two possible locations, but one makes the barrels protrude too far and in the other they are too short. So, based on photos, I adjusted the position (sanding and testing) to show the length of the visible barrels to match the photo refs I have. The gondola itself didn't fit as neatly as most of the other kit parts. There was quite a sizable gap in places that had to be filled and sanded, then localised spraying was done. On some of the ref photos I have seen, the gondolas seem to be 'caulked' into position, so I didn't feel to bad.
I then started to enhance the panel lines with the pencil method - the first time I tried this. After a couple of errors that were erased, I got this finished to my satisfaction. The two close-ups just show it in a little more detail.
Pictures 4, 5 6. After a spray of matt varnish to protect the paint and panel lines, I gave the panel lines and underside a wash of very dilute black/brown enamel, wiping off any excess with white spirit, before it dried too hard. I'll have another look at the extent of the weathering when I come to add gun smoke staining, etc.
Pictures 7, 8 9. I started the same paneling process on the topside, but haven't finished yet, so more photos of the overall look anon.