Making curves in stonework.
(You should use lathes and rocks to secure the posts just as in making
a straight wall, except for very low walls)
Neat curves are difficult to do properly. You can use this method for
near perfect results every time!
If you are building a double faced curved wall, of course you need
3 extra stakes and extra pipe to attach to it.
When you are finished one piece of the curve, move the stakes onto
the next section, line your next piece of curve
up with part of the last curve and continue.