On Fri, 03 Feb 2012 05:13:50 -0800, wrote:

When I think flagstone, I think irregular
shaped stones set about about 3/4" to an inch apart.

Here is the final laid stone.

It turned out that spacing them wasn't all that difficult. I did it by
eye as I gave up on my spacer ideas, all of which turned out to be
unworkable in practice.

Here is a pic of the final spacing:
http://picturepush.com/public/7517997