Okay now that I have had a chance to use it and know for sure that it works quite well I will post pics of my filter . I made it from a 5 gallon bucket lid , a screen from a stainless food strainer , braided line , a piece of vinyl tubing , a tee fitting and some PVC pipe .
Note that this is the top of the lid . It sits upside down in the tun , rubber seal up.
I drilled holes in the lid about the size of my finger . Cut some 1/4 inch PVC pipe up and tied it in the lid . This is to hold the lid up for support so the weight of grains does not press down and squish the braided filter . tied in the braided line and attached to tee and vinyl tube . Took apart the strainer which I got at Walmart for 15 bucks . It is rectangular and had to grind it apart as it is welded . Wrapped that around the lid to stop grain from falling through holes in lid . This is cheaper than stainless steel window screen unless you have a use for the rest of a roll of screen .
It slips right in the cooler and I just grab the vinyl hose with a pair of needle nose pliers and pull it on to the nipple of spigot . That is why there is a slit in the screen at the tube end .
this worked real good and I used about 13.25 pounds grain and 9.25 gallons water and got back 8 gallons . there is only about a quart of wasted space under that lid .