Set refrigerant charge to 10 degrees subcooling however the suction pressure still somewhat lower than desirable. 98/257 3° superheat 10° subcooling. System appears to just not have enough blower cfm available. Double checked dampers and ducts. We need to verify the tonnage of the existing furnace. Appears to be 4 ton. We also need to address the direction of the bypass damper and levelness of system. Make sure that no ductwork is pinched on return or supply plenum. Photos are uploaded of furnace, bypass, and etc.