[MidMOTraveler]

Just pop a couple of the directional vents off. You will be amazed at the difference.
I did do the pvc fix in the return air. But we had another issue with the back unit not being mounted directly over the opening. Had some water coming through the back return vents, mobile service found and repaired. Submitted pictures and bill to Keystone and they reimbursed.
That really made a difference!