Not much to see other than a new thermostat on the wall, did add a switch to set the fan on high or low speed. All wiring was fished and is hidden in the wall and ceiling. The control box is inside the AC unit return air, it mounted on pre-installed studs.
I did not purchase a new air box cover/grille, figured I would just get some hole plugs to cover the openings where the ceiling mounted thermostat was located. Put the old controller on a shelf in case I ever need to change it back.
The hardest part was using my poor soldering skills to prepare the switch for mounting in the thermostat to control the fan speed. Otherwise super easy.
John & Mary Jo
Enjoying the adventure