Well right away I notice your powering with a trash pump Instead of a dredge pump like a p180 or hp series from proline .. The trash pump has a limited capacity and won't produce enough suction to operate a normal dredge properly . Second looks to me like this video was shot in A man garage or basement with a large black sheet for the back ground ... I'd rather deal with someone a little more established and maybe a better track record.. Third watch all of his videos and look at the claims someone who tells you there's virtually no gold loss is selling you something that isn't true All dredge ,high bankers and wash plants have a certain percent of looses... It just the fact but instead of ligit testing we find folks who drop a tote behind a dredge for a short period of time and call it virtually no losses.. That not right if you ask keene or proline and they will tell ya straight up there unit have losses.... Ya have to wonder if someone isn't being honest with ya about loses what els are they telling ya that's not true! Now this is just my insight.... I just about jumped on some matting from gold hog for my dredge about 900 dollars worth.. Can't walk into any place and buy it and when asking around I find that when most of the folks who have put it into there dredges take it back out.. Because it doesn't work well in dredges,,, I think doc has some great ideas and like the way the matt is put together. But I hate they way he try's to sell his products... Like I said nothing is perfect and when someone try's to sell ya on how perfect there's is ya have to wonder what there hiding.. The proline and keene units are drastically different there more rugged have float system and area basically dredges with the ability to convert to a high banker .