It has been a good couple of weeks of progress. ADE is at last beginning to look like a useful utility. I am now adding things like Add and Delete. Most objects are now displayed correctly, drag, drop, zoomimg and so on works in the way that I expect it to.
Currently I am thinking about adding and deleting, particularly in relation to taxiways. Adding points, paths and so on plus what happens when a point is deleted that has several paths attached to it.
It will be a while yet before everything is in place but the guys over at fsdeveloper.com are a great help. In the meantime I will try to release one new build each week.