Hey Rich,
Maybe it's just architectural work, or maybe I just need to delve into how Blender inferences. Snaps work just fine in Blender, but it's a pain to navigate because I'm always having to toggle it on and off if I am drawing. Does Blender follow line extensions and not just xyz coordinates? Any good tutorial reference about this you may be able to point to? I'm mildly curious. (I say mildly, as I am crunched for time as it is, and SU just gets me there damn fast. I hesitate to learn anything new currently.)
Andy