Thanks guys.
I think you're right. I think the problem probably is the overlap between 3 & 4. You obviously really do need a fair chunk.
I shall re shoot it now & report back.
It's shot on an RZ with a 110 lens, so no wide angle.
(But I am thinking of trying one next week on a Cambo Wide! (35mm lens))
And yes andy, it's the view from my kitchen balcony in Zurich
Thanks again.