<< Most likely, this is just so obvious that nobody thought it needed pointing out. >>

<img src="images/graemlins/blush.gif" alt="" /> That is correct, and I apologize for not realizing that you weren't doing that!

The spacing varies with size of logs, amount of coals underneath, specie of wood, moisture content, etc - but it's all fairly obvious if you tend the fire.

Sheesh! I wonder sometimes how much time we could save if we could simply get together to show/try things instead of writing back and forth in more or less real time...

Since you hypothesized this all on your own, give yourself credit for figuring it out.

Regards,

Tom