Building a sluice box. Options

[GNR]

So, I want to start doing some sluicing, and im too impatient to wait for a sluice to ship to me from online, and no where in summit county seems to sell one. SO, im just going to have to build one.

Im thinking, 4 feet long, 1 foot wide, sides being 3-4 inches tall and made of wood

a base layer of some ribbed carpet from lowes which looks like it should work well that should cover the whole box.

Then a layer of expanded metal on top of that, but that will only be on the last 3 feet of the box, leaving the front foot of the box to allow for material to break up.

The only thing im not sure about is the riffles. Im thinking of making them out of wood, but im not sure how im going to mount them in there, their size, or their spacing.



or maybe i should just order one online.