I've been doing the dual plates/heavy weight thing for years and it never seems to remove enough liquid for my taste. What I have been doing is using two platters or trays at a slant in the kitchen sink, with a heavy jar of bulk rice or large canned goods.
It would seem Williams-Sonoma would have come up with a $50 device by now to make this process more efficient (LOL).
I'm about ready to experiment with scrap pieces of wood and C-clamps. Seriously. Actually, that's not a bad idea, hmm....