Thanks Ryan 1981
I copied a bloke under the name "astrobouncer" on you tube, he's got some pretty good builds all timber.
No haven't tried it yet ,I've built a couple over the time one aluminium which worked fine don't know where that went ,and another timber one with matting and timber riffles more recently .
A steel " hogpan" is next, that looks pretty good. Following that a flail type rock crusher .
Love u tube I'll look under building a sluice ,cheers