I didn't read through the whole thread just 1st page, but did anyone mentioned that you need steady water level in the sump?
If you don't have auto water top off, the sump level will fluctuate and you will have to constantly adjust skimmer level.
I have Reef Octopus bubble Blaster 3000 pump in my skimmer (Not SRO)and it is tremulously powerful and quiet skimmer.
But you need constant water level for sure.
hth
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