What a great long weekend 
Got heaps of coding done!
First of all I realised (belatedly) that everytime I used an FVector it was “floatifying” my beautiful doubles, so I spent a whole day fixing that.
Then I modified the topology of the mesh to reduce the pinching at the quadratic poles in the mesh.
Then today I got the octaves working:
I almost got them repositioning around a designated point but it got all stroppy and my brain doesn’t do the clever after 10pm anymore so will have to keep hammering away this week.