My elbows point down and are 3/4 of an inch off the bottom. There is no wasted food and they can't rake the food out. Please post a picture of yours, I made mine per the thread on here. Except, I used L brackets with small round head screws. This way I didn't have to use silicone and I know they won't ever move.
I made that feeder too, but they did not seem to use it it did not empty nearly as fast and a few seemed not to get it so I was using both for a while and they use the pipe feeder more than the bucket. I am hanging on to it, I like to put out multiple feeders when I leave for a few days
Gary