the one flaw I see if the splash plate for the skimmer overflow water.
As it is here, it will spill over (more downward) and not splash horizontally.
That is to say... the way you have the plate mounted here will make the water fall over and down unless you measure the sump wall panel very carefully and make it so that it is just high enough to always keep water over the plate.
Else... it looks fab my friend
