I use a stainless steel screen that fits over the bottom of the dip tube, got it at my LHBS for about 5 bucks. Just toss the hops in commando, first pour some trub/hop material but after that it’s clear all the way to the end.
I hang them in a stocking with a piece of mono fishing line from a piece of stainless with a hole in it that are welded to the underside of the keg lid. I had the same issues with leakage. It was really hard to believe that 4 lb test fishing line would cause it to leak.