A nice, easy controllable flow works well for flour gold. Tsunamis might capture chunky gold, but with flour gold, a lot will get blown out of the highbanker.
@@TheJohnEdmonton - I always imagine a sluice being a miller table, and work up from there. Bascially, a sheet of glass for water flow, with minimal turbulence in the matting or drop riffles, and as close to zero bubbles on the surface as possible.
