Mark, Contact Steve Freeman or Phil Hart. Click on Members from the menu above and you’ll see them. They have a cool design that has a fluted neck which keeps water intrusion out. When we rebuilt the engine in 749C we changed all of the hoses and pulled the tanks. Wish I’d know about it beforehand. My plane rarely sit out except for Oshkosh and I’m always jumpy after sumping the water out of the tanks after the inevitable WI rains during Air Venture.