Hey Vini,
I have not tried to dredge with that belting yet, but I plan on it before and when the season opens. Before I test it I need to figure out how to attach some wheels to transport the dredge that will come off easy when we get to our put in location. My buddy is extending the sluice box to improve the fine gold recovery. After I get the wheels attached I will bring the frame in to a welder to weld the stress points and we will be ready for the test before the season opens. I plan on having the belting material in the top 16" of my sluice under the punch plate, and the rest of the sluice will be riffles, over expanded metal, over miners moss, over ribbed v-matting. The bottom extension will be only expanded metal and no riffles.
I think I mentioned to you my idea of making a boulder bag. I have given up that I dea for now in favor of four 33 gallon barrels under a platform that holds a 3k boat hand winch in the center for transporting boulders down stream. I don't know if I will have time to get this project done in time though.
Last week my buddy went out with a friend to the river we are focussing on and he used the A-51 with the belting in the top flair section. The river has gone down so he was able to run some gravel from a lower bench. He ran 4 buckets and got good color, so I'm excited about getting off the benches and down to bedrock this summer.
4 buckets:
You can see the stuff in the picture above is much bigger flaky gold on average whereas below is super small super flat stuff that likes to sail out unless the box is set up just right. My friend said that the belting caught about 50% of the gold in the picture above in the belting material. A couple weeks before this we took the time to set the same box up just right and caught about 90% in the belting. When he ran the 4 buckets he had very little water flowing a lot faster than normal.
I posted this picture on a Canadian forum of some super fine gold I found on another river. I classified it down to 1/4 minus and ran it through real slow. I am still learning what speeds and angles work good for certain types of gold. I think that belting would work excellent by itself for super fine gold in an over under sluice where the water is slowed down so the small gold can settle out. I think the belting will capture super fines all the way up to flake sized gold you see above if your box it setup right. I think the ribbed v-matting might not hold the medium sized flakes like it holds the super fines. I still need to do more testing.
Here is a picture of our first picker that we found about a month ago. I posted this picture on the canadian forum as well. It was sure fun to see that guy show up. We ran about 15-20 buckets through our hand sluice that day and were rewarded. My buddy called me over and I thought it was fake at first. This is big gold for Washington.
Sounds like you have your hands full before open season as well. Good luck on your new claim!!! Sounds exciting.
-Kevin
. JK just trying to join in the fray before it gets started. 
