The church now has the real wall sorted. I’m not 100% happy with the design of the front corner, but I think suitably detailed and painted it should be ok. Not restarting now!
Need to come up with a solution for the bottom of the window arches, don’t have enough actual pieces (or a mould to cast from!) so need something else. Sure I’ll find something.
Bought some more ink for the printer and transparent paper so I can print out the windows. Then I’m going to cut cardboard overlays to paint up the same colour as the stonework. Should all be ok I reckon.