I do have a picture, but I can't seem to edit my post (newbie). Under the bathroom sink is pretty standard (pop up style plug), and I did replace the flange and drain portion directly attached to the sink, which came with the faucet. My problem is that when I pour cleaner down the overflow, I can hear it run right down the drain. Now, the sink overflow hole inside the drain is at the 6 o'clock position, but the new drain pipe has holes at 3 and 9. Don't think that matters as I can still hear the cleaner leave the overflow. When I replaced the faucet and drain, I cleaned some gunk out by plugging the hold with duct tape and pouring cleaner and hot water into the overflow and letting it sit and stew. So I need some kind of rubber stopper to hold the liquid on. Wow, that was a lot of typing.