I do not have the weedless system. If you could find the parts, I'm sure you could add it, but the real question would be at what cost? I'm sure it would be expensive to add the components. Here's a partial list of components and prices. Schematics with prices
That is true. I was thinking of possibly adding just the articulating part of the grate. Don't need it fully actuated with a button. Don't mind getting under and manually unhinging it since more often then non, i Just need to pull a rope out then have it closed with weeds