I'm pretty sure there are a couple of suppliers that do a powered setup as a buy so it is definitely possible, as a river sluice its quite long and would need some cutting at the entry end, that wahl would need to come out, i imagine it would need some good flows to keep it working and be hard to remove without unsettling the riffle capture (I'm thinking like the McKirks are), put together a highbanker with a box and grizzly/classifier would be my thoughts to keep it more stable, and you would need a tap to reduce the flow before clean up (again like the AM style) . There is a boss conversion or two on here in other threads for some inspiration in the AM highbanker conversions, I'll be looking at this thread to see your thoughts and others but i think a river sluice setup with this would frustrate you, after all if you're going to classify might as well get flow and production out of a banker.