[youtube]http://www.youtube.com/watch?v=4FGnOsF8h5Y[/youtube]YouTube - Highbanker sluice
This fellow really got me thinking... Highbanker conversions on a sluice doesn't have to be expensive or complicated, If it works it works! My main concern -because I'm really quite lazy- is weight and how easy it is to carry. So I got to thinking how you could improve upon this guy's design. The wash box/hopper seem awfully cumbersome to me. Instead of using a wooden box why not take a 5 gal bucket, lay it on its side, then cut the top half or 1/3rd off. Lay down a BBQ grill or some other sort of classifier, fix on some spray bar and wham! Bob's your uncle!
here's some primitive drawings.