Thanks very much John.
Some progress with the interior has been made, although there are still some areas to attend to.
PICS 1 and 2. The cabin and cockpit walls painted, and the details picked out. The rather rough 'wash' has since been toned down!
PICS 3 and 4. The seats being installed, and the cabin floor painted. I decided against taking the time to add lap belts, as they won't be seen, from any angle!
PIC 5. The rear of the cockpit area, which faces into the cabin, showing the red electrical junction box and wiring, and the quilted cladding around the rotor shaft housing. The latter, again made from lead foil pressed on my tool case, has yet to be painted pale green.
PICS 6 and 7. Some scratch-built detail is in the process of being added to the cockpit, with switch panels, knobs and levers, and the port collective lever, made from plastic card, rod and shaped stretched sprue, and the foil quilted padding.
Next step is to add the rest of the cockpit detail, then make the seat frames and seats, before installing the instrument panel, which will have the pedals added from plastic rod.
Thanks once again for your kind comments, and I'll post another up-date soon.