I've posted a pic on my highbanker connected to the Avago double foot pump bought from local prospector shop.
Unsure of set up as cell mat is clogging up at 11 degrees but top box is clearing well. Thoughts /help please
Different materials will require different angles so just experiment with the material you are running through & adjust until you find the right one.
Just keep a catch pan under the end & pan it off to check for gold loss.
'Tis a really nice build on the sluice
From my experience your chosen deep rubber mat profile requires more water than the pump can deliver, so bucketing water might be the go for your setup cos you need a flush, rather than a trickle to clear that mat. Try something with a shallower profile - half the depth or less, than what you are using at the moment.