I wired in the damper for for the duct we added to the master. It is now properly being controlled by the thermostat with the main floor. I added a manual damper behind the zone damper and dropped the air going threw the damper. I also adjusted the bypass damper to increase return air pressure and opened the return grill in the master to pull more air out. I also flipped the original supply grill around and adjusted to blow towards the windows to mix the air correctly. The customer is not using any window coverings at this time(blinds ,etc). This increases heat gain and loss threw the windows. While it’s not the main concern this will cause increased run times causing other areas to over condition. If we have to return for the master over conditioning, we will need to add an 8” manual damper the the original supply for the master bedroom. It will be a tight fit but it’s the only location that will properly work.