I used an assembly like Gary posted and it works well. After 4 years I'm starting to see a couple of drips but other than that no issues.
I tried using a cooler
like you posted a picture for but couldn't figure out a good way to make all the corners inside to be sure I wasn't leaving a lot of wort behind.
It may work great for you. I admit I'm really paranoid, over think everything and doubt every design I've ever created. On the other side of that, everything I've ever built works.
I'm sure it will work for you too.
** edited spelling of cooler. Yes I'm OCD and have a beer named after ODC that I cleared with a friend who has a son who is OCD just to make sure he wouldn't be offended by a beer name that makes fun of being OCD. God, need I need a drink. Or maybe I've had enough. Who the H#!! knows.