After viewing your review of the GMGT I got to agree with your comment on the quality of the product ! Using Lexan , stainless steel and alum. in it construction is a very big plus And the quality of the finish is top notch . The finished edges on the Lexan and alum. w/ rounded corners are a plus in my opinion! There are two things that I think would improve the results for fine gold and using it in a "clay" ladened creek. 1) although it worked fine with the material you used , I think putting your material into the device higher up in the wood trough would help in stratifying and getting the fine gold to drop out of suspension better (using the wood trough)and the 2 tubes you use to create the fluid bed would benefit by flaring the inlet tubes where the water enters these tubes would increase water pressure and help eliminate the build up of black sands . Altogether I like this device and the quality of the material that is built into this device & AND you couldn't find a better guy than Mike Pung to be your mentor ! Red (his partner) is a great guy also ! I'm glad someone brought this product back out !!I'd love to win one of these !!GOOD REVEIW !!