Just got these in, after placing a Saturday morning order!, and testing this out. I've taken out the center plug like bad suggested and I haven't had too many flooding issues. But I think it has more to do with my getting a handle on how it works than an issue with the system. I've also been doing a lot of dripping. Trying out switching flavors and I'm loving it. About to hook up the system and enjoy some ry4 and beer!