Bob, I have never seen a screen smaller than #100. I am going to have to look into that. It is the smallest that I have. I even bought 4 inch versions of the 50 and 100 that cap top and bottom and twist lock together.
oooooh........may have to order this one
Saw this at a gold show and was impressed he was running beach cons.
http://www.royalmfgind.com/index.php/products/product/316/gold-prospecting
It will take lots of -60 gold to recoup the cost. With that said I agree with Bob just use a pan. Wish I knew what the matting is on this as I would make my own.