The arches now have a mirror image .
The joints will be covered by thin metal strips, with metal cross-ties holding the top of the lower arches in position. The cross-ties pick up the cross pattern just below the roof edge of the building.
Here's a first test of the metal strips to see how they look.
I first thought of using silver (in an ideal world) but I like the contrast of the copper's colour - although that will tarnish, of course. So I'll try it with aluminium, too.
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