Oh bless! Thank you D
This is going to be one of the difficult areas between us. Some will make the cliffs look deadly steep, while others relatively shallow, but as long as we all sort of stick to the line along the top edge and the line along the bottom edge (the water in other words), we should at least meet up right.
If you want to change the top line you will have to negotiate this with your neighbours, or if you don't have any - with J.Edward