I've replaced nearly every gasket on my pool pad since taking ownership of my pool last summer. It just got cold for the first time and I noticed a little seepage from the SP740DE multi port valve on the filter. Is there anything special about replacing the gaskets on this valve vs the smaller neverlube valves? Is there an outside O-ring as well as the internal spider gasket? I figured once I was in there I would replace the spider gasket as well. Is there anything different about that then just lube it up and drop it in?