Hi CFT and thank you for your kind words.
By way of an update to other members who know me I have to report that I had something of a medical crisis a week last Tuesday. My re-surfaced hip has been giving me trouble for some time now and I was still having to take pain killers. Anyway, late on Tuesday night (20th Jan.) I bent down to get a fresh roll of solder from the bottom drawer in a cupboard and there was an almighty crack followed by a scream of agony from your truly. Couldn't get any medical assistance until 8 am the following morning when an X-ray showed that the whole ball of the femur had broken away. Was admitted straight into hospital at that point but it was not until Saturday (24 Jan) that they were able to operate. To cut a long, and painful, story short, I had to have a full hip replacement and have only today been discharged from hospital.
Hey ho. Another 5 weeks convalescence so chance to get some modelling done without the unwelcome interruptions of work. Possibly time to make a start on that viaduct at last.