They replied it’s gone. Had chance at it this morning but didn’t really feel like going bigger.
I’d run a split sump either with two separate returns or a joint with maybe a SCWD or some other device. split sumps that way one side could be serviced while the other keeps operating. Mechanical filtration on one side, horizontal ATS on the other. Opposing pumps on a controller alternating towards each overflow.
They seem to make available options to toy around while never shutting the whole system down.