Thanks Hugh.
I haven't bothered re-painting the engine yet, as there's going to be a lot more sanding dust flying around. But, it's getting there, and I finally feel as if I'm making some progress.
PICS 1 and 2. As I suspected, the cowling didn't bed down fully, and the joint needed filing and sanding, especially around the oil cooler intake. Also, there shouldn't be a joint line around the entire cowling at this point, so the whole lot has been sanded, and awaits polishing.
PIC 3. The attempt at making the cockpit air intake from the Spitfire tropical intake failed, due to the thickness of the internal mouldings, shown arrowed. So it was on to 'Plan B', with the redundant rear seat from the kit being cut down and filed to shape.
PIC 4. This was the result, and the intention was to fit this in place, and then build it up with 'Milliput' and sand to shape. But I was far from happy, especially as the overall width was just a touch too narrow, even allowing for the putty. So, on to 'Plan C' which, so far, seems to be working.
PICS 5 to 7. A hunt through the spares box found the tropical intake, left over from the ICM kit of the Me109F. This was separated from the lower cowling section and then cut down the main body, at the same time removing about 3mm of plastic from one side. Unfortunately, the part split when the cowling section was removed, hence the off-center joint, but it went together well enough for me to trim and sand the mating surfaces roughly to shape, and then glue it in position.
There's quite a mess of glue around the edges, but as the part has yet to be sanded, and the edges and joint blended in, this is not a major concern, especially considering the amount of polishing that needs to be done over the entire model!
Once the part has fully set, it will be supported internally with a scrap of plastic, and then the sanding, contouring and blending will be done, before moving on to the next stage, polishing overall, and re-scribing where needed. Then it'll be time to prepare the under-wing stores, in order to check clearance for the drooped flaps, which will be fabricated using the separated kit parts, together with plastic rod and strip.
Thanks again for your kind comments, and I hope to post another up-date soon.