Rob, thank you for the nice compliments on my QAYG sashing. If I get it right, that sashing lays flat. If I get it wrong, it ends up heaped up in a little speed bump. Trying to avoid any speed bumps...
I posted a tute on joining that way in the tutes section, if you haven't seen it:
Quilt As You Go (QAYG) Tutorial Loads of pictures to make it easy to follow.