For some of you who may wish to make some changes to your sluice box, this mat may be the answer... The video shows it in action. I can't wait until Doc gets it on the market. enjoy the video
Interesting, and I know this is still being fine tuned, but I noticed that the gold trapped was three quarters of the way down the matting.
It is on its way out of the box if it made it that far.
My experience with expanded metal and miners moss, is that almost all of the heavies are in the first 20 percent of the box.
Equipment testing by the manufacturer can often be slightly biased.
Still an interesting design, and I hope it works out for him.