Just some feedback for Mikrotik if they care much.
Three Metal 52 ac units I purchased maybe 5 years ago have all had the plastic window perish/separate from the body. It would appear it didn't like being in the sun.
Easy solution was to remove the window and bog them with some roofing silicone.
If you have some out there, might be worth having a look at them especially if the UV is pretty strong like Australia.