Thanks again all and making progress. See attached picture.
Phal is repotted with a proper substrate. A good quality commercial mix with a bit of sphagnum added for the dry winter season.
The root system and sphagnum were “packed” into the small pot. I’m amazed the roots are still in such good shape.
My Thermometer/hygrometer combo is registering what seems like pretty good conditions for now. The fall season and lights are combining to give me a decent day/night differential now.
Still have 5 pots and a bag of substrate left. Feel like I am ready to look for more