Not sure about the SEACHOICE model's? You sure don't want the Rabuds.
You really want the T-H Flow-Max™ Ball Scupper's.
http://www.thmarine.com/product.cfm?PRID=55
This is what I have.
Tired of scupper leakage? Replace your old worn-out flapper scupper with our new Flow-Max™ positive sealing ball scupper. New easy twist-off design makes cleaning debris a snap. Simply twist counterclockwise to remove ball cavity, clean out and twist back on. Stainless steel security pin provided for added safety. Larger exit hole allows 70% more water drainage than its nearest competitor. Multiple mounting holes make retrofits quick and easy - no filling holes or re-drilling. Neutral buoyancy ball insures ball won't float up and break seal. Meets all ABYC standards.
New easy twist-off design makes cleaning debris a snap. That's the diffrense. Easy to clean and not have to unbed the units.