This is what I use. I cut the socket end off, and slip it over the narrow end. Makes the elbow a little shorter. but I think some people use it as is. The longer the reach, the less waste, but could be hard for small birds.Ya it isn't a big deal with a handful of chicks but.....
I hatch 30-35 or so a week. That adds up quick and spilled feed can add up to quite a bit when dealing with hundreds of chicks and juveniles.
Including "street elbows" "2"" and "about 4 weeks old" is exactly the info I'm looking for.
Thanks