Thanks a lot guys.

I'm really enjoying making them at the moment, and as they will be useful for my own maps it's kind of a win-win situation for me doing them in one lump like this rather than creating them one at a time as and when I need it. It also means I'm drawing more than I strictly have to so when it comes to placing them I'll have a lot more variation than I would have had.
And if it helps a few fellow mappers then so much the better.

I'm toying with the idea of redoing many of them once I've completed enough to call it a set in a much more rough and ready style to form a second set that doesn't quite follow the iso form as slavishly as these are.