You need to watch how your material climbs the cone and adjust as needed. I've been running about 1"inch below the top edge seems to be about right for the concentrates I'm running. Haven't had the same results as the video but works well. I like Reed's setup also my gold is micro not like the pickers in the video lol.How high do you set the water from the top when using the mat inside the bowl. I watched a video of< I'm assuming, the guy who invented this mat, and he set the water very high. Of course his demonstration probably had pre classified material at a particular mesh, which I believe, made catching all the gold very easy.
I did order a mat, and hope it fits my Bowl, purchased about 15 years ago.