I'm sorry to go on about my wretched roof, but there's no doubt about it; I cocked-up big time.
This is what comes of being a rank amateur, and trying to work things out on paper, or in one's head, rather than asking a seasoned professional.
You see the small 'planks' that come out from the longer ones (the ones that end up right on the edge to make the 'sweep'), well they're too long, and will all have to come off and be re-cut.
Part of the whole roof effect involves the final tile of the overhang lifting slightly to create that pert and sexy curve that makes local buildings so special; and I got it wrong.
So, yesterday I took them all off, re-cut them, and re-positioned them. It pained me to do it but it was essential.
The waste of a day? Not really. Hopefully it'll give peace of mind for ever after, and if this is my only major fault, then I guess I should be happy. Only time will tell.
Actually, yesterday went very well. Not only did we do all the above but we also got most of the new waterproof membrane up, Lady Magnon single-handedly installed a thick layer of insulation (horrible job), and I even started nailing up the laths. Dinner last night was eaten with smiles; and very few expletives.
Another hot sunny day is forecast for today, so things should advance well. In a few days time we'll probably be blaming our tile-maker for keeping us inactive (if he does).