Thanks Frosty, I like the idea of a sacrificial end. Although, to be honest, I couldn't find anything but the plastic thread protectors so ended up with threaded conduit couplings. Not free, but cheaper than pipe nipples.
Wayne, thoroughly enjoyed my visit at your forge. I hope to be able to come back and spend some more time soon. My wife loved the leaf you made by the way.
For those that don't already know, when Wayne says "let me know how I can help" he means it.