No probs Henk ;-)
I am very close to 100% sure that those were King 3 pumps, rated at either 2400 litres/hour or 2700 litres/hour each (x 3).... Those are the same pumps that my TS2's came with, and I must say even after about 5 months using my TS2, I have seen NO PROBLEMS with the pump (I removed my skimmer and cleaned it up, and placed it in another compartment of my sump, about two weeks ago....
So - so far I cannot complain about the skimmer/pump.
I must say - those King 3 pumps of your TS4 have a VERY interesting needle-wheel design - where the actual needle-wheel has needles BOTH front and BACK of the wheel (both sides) - I am quite sure that mine only has needles at the front? I could be wrong though.... This means that the pumps on your TS4 should be far more efficient......