Thank very much Michael.
Progressed quite a bit overnight - I stayed up all night, trying to get my 'body clock' back in line.
There were a couple of things that needed attention before making and fitting the gun sight reflector screen, and these are shown below.
PIC 1. The first 310 Spitfires had the original, tubular antenna mast, slimmer and taller than the later 'streamlined' mast commonly associated with the Spit, at approximately 68 cm in height. Most, if not all, Spitfire kits have the later mast, which had a substantial, slightly raised, reinforcing base plate, shown here being filed off.
PIC 2. The early mast had a thin rectangular plate in this location, with the mast set into an insulator 'pot' on the base, and the plate is in the process of being engraved in this pic, along with the panel joint immediately aft of it. The mast itself will be fitted after painting the model, and I'll probably use alloy tube, with the 'wire' threaded through the inside bore, as on the real aircraft.
PICS 3 and 4. The reflector sight at this period had a circular reflector screen, so the 'square' screen was removed from the gun sight, the sight body painted, and then cemented in place. Once set, a disk was punched from clear sheet, and attached to the front of the sight. I would have preferred to have used thinner clear plastic, but this tended to 'dish' when punched. There should also be small support brackets on either side of the screen, but that job was beyond the capabilities of my stiff hands at the moment !
PIC 5. The upper wing sections are moulded with the muzzles for the two outer guns protruding from the leading edge. Whilst this was the original arrangement in early RAF service, by the time of the BoB, modifications had been made to the barrel nut, and the removal of the flash suppressors, with the muzzles now inside the wing blast tubes. The muzzles have been removed, and the blast tubes opened up - they'll eventually be covered with painted tissue, simulating the doped fabric patches.
PICS 6 and 7. The undercarriage indicator pegs on the upper wings are represented by small 'blisters' (red arrow). These have been removed, and small holes drilled. Once the model has been painted, decalled and clear coated, the 'pegs' will be added, made from stretched sprue, painted red.
PIC 8. The windscreen and rear canopy in place. A small part of the lower, port frame on the windscreen cracked off when removing the part from the sprue. The gap will be filled with PVA. Once fully set and blended-in, the clear parts will be masked, and the frames painted in the interior colour first.
PIC 9. The wing has been assembled, and the leading edge seams cleaned up and sanded. The base of the internal section has been painted in the appropriate interior colours, matching the corresponding areas of the fuselage interior. The radiator and oil cooler assemblies will be fitted once the wing has been attached to the fuselage, along with the lower cowling section, and any filling required has been completed.
PIC 10. Test-fitting of the wing assembly, only pushed in place here, is positive, and shows that any filling will be minimal, if indeed any filler is needed..
That's it for now. Got a routine hospital appointment later, and possibly going out tonight (if I'm still awake !), so the next up-date will be some time over the weekend.
Thanks again to all for the interest and positive comments.