As I mentioned a while ago I had to redo the tiles design I had started for Border Reivers increasing the resolution for better printing results. I took advantage of the opportunity to write a small program to accurately place the overlay elements, and since then I have been working on improving the drawing side of things.
You can see the latest version over on the Border Reivers Design Page. Still not quite finished, but it's definitely getting there.
I'm currently soliciting feedback, so if you've got any comments now's the time to make them before it goes to the printers :-)