that second picture is my keggle. and yes it did get clogged with a lot of sediment the first time i used it, but that's cuz i used whole hops without a bag. it gave me hell for a little while during that brew, but it drained every drop out eventually. that's only 3/8 copper tubing as well. it works fine for me, now that i put my hops in a bag. that mesh screen is a good idea tho. i may have to upgrade to something like that.
"Sometimes when i reflect back on all the beer I drink, I feel ashamed. Then i look into the glass and think about all the workers in the brewery and all their hopes and dreams. If I didn't drink this beer, they might be out of work, and their dreams would be shattered. Then i say to myself, "it's better that i drink this beer and let their dreams come true than to be selfish and worry about my liver."" -jack handy