AC tune up refer to health inspection report form. Return and supply side are both higher than normal, main pressure drop is after the filter though. Given the equipment is an ECM motor it has parameters it wants to be able to reach and it doesn’t care about restriction in the ducting because it wants to reach the parameters of airflow it’s programmed to achieve. Given current state ideally we would be using a larger filter to reduce pressure drop and adding a return somewhere in trunk to help static at return fall to a better spot. Filter has some gaps in it allowing bypass, unfiltered, air to make it into blower compartment and through main body of unit. This would be helped with a more capable filter like an Aprilaire filter that seals much better and helps prevent dirty air making into equipment there is a fine layer of dust on the inside. Outdoor unit running well just some mild wear signs on contactor which is fairly normal wear on contactors like this. Recommendations ref