I didn't check the alignment with the way you'd planned it, just wanted to get an idea of the scale of it all which is BIG!
I rotated the map 45 degrees to so I could measure the picksles easier.
Ah, your whole valley could fit inside that pyramid, almost twice? :S
If you imagine four of those pyramids in a square - I think that's about the area if we'd need if we halved the scale. (Full scale is closer to nine, or maybe more.)
Definitely not oging to get much done while the server is down :(
I'm off for the weekend anyway so will be back Sunday/Monday to help. It is going to take ages to manually clear it all away.