Hi Rich,
Thanks for the video! It's been fun watching your progress in getting this engine going again. Color doesn't look too bad to me -- maybe a little on the blue side -- but not bad at all. Was glad I could help you out with the fittings.
I use Loctite 542 on threaded fittings, and it rarely lets me down. You need something that won't extrude out of the thread under heat. And it needs to be a good mechanical joint. Shake the bottle before using, wipe off any excess, and let it set up overnight. The fittings can be removed normally later on, but the 542 crystallizes as it cures, and can be a bit of a pain to remove before resealing the joint.
Happy steaming, my friend!
Paula