Just bought a second hand Keene 140 dry blower...The first piece in place to attack some desert gold..I will build a rock crusher...and a concentrating sluice ,I think I will use wood for the sluice , not alloy..and the last piece in the puzzle, a blue bowl? I think..That 4 pieces of kit should hopefully do the job..going to copy the Keene concentrating sluice and matting but incorporate one of those U traps like in the gold cube..in wood..cedar,maranti,tasty oak..?