That lineset cover is some slick stuff! I loved installing it as it made the job look pro. The disconnect is because of the sag in the brick after about 35-40 years of being a building.
Those Lennox wall mount units were junk, hence the reason for the XB 300s. I worked on some of those during my summer internship and those units are crap, they were built to leak and look like an eyesore. The XB 300 is a metric ton better than those wall units, a lady in the basement apartment by one pad told me that she couldn't even hear all three units running with her windows closed. The old wall unit used to make so much noise she couldn't hear the TV.
Things leaning to the right: I took these pics as quick as I could on the job. I wasn't too proud of my brazing work on most of these units, and some of them when nitrogen came around, you could tell were on the end of the day work...a couple of issues, but nothing too bad. We got them tied up and working...not bad.