What have you done today with your Austin Seven

[A G Wood]

Yes, same fastening system Tony. Saves all that tiresome hammering and has colour matched hex heads. Our place is in a nominally high wind zone so there's fastenings for Africa. Our chimney sweeper is quite a light weight guy so 0.55 will do, although last time he swept the flue from the bottom end with a thing like a giant weedeater on a flexible shaft and didn't go on the roof at all. Management won't allow 90kg me to go on the roof.
Forgot to congratulate you on your micro museum, there are a few of those little gems hidden away here and there and I find them always worth a look at another chap's passion.