We needed tip tank outlets and finger screens, so I cut down two bulkhead elbows and bored them out slightly to accept a filter. I used almost telescopic copper tube (with a slot cut in the outer piece) to shape stainless steel mesh that I bonded along the edge with JB Weld. After it sets, I'll trim slightly and fold down the tab to fit inside the elbows, then bond in place with ProSeal as I install the outlet in the tank wall.