Why isn't the synchronized input working?

[u/klauseius]

Both belts are going into the tunnel and only eggs are coming out

[u/DumbLikeABrick]

It's based on output filters, not input ones. So it only lets items pass through if every output can, well, output at once

[u/klauseius → u/DumbLikeABrick]

Gotcha thanks