"Catalytic Synthesis Methanol" and "Catalytic Synthesis Formaldehyde" recipes are using same icon with a formaldehyde icon on left bottom. Should the former recipe have a methanol icon? It looks confusing now.

For example, i want to make an inserter that can pick up items from two position, or a transport belt that have one line or three line. First thinking comes to me is, extend the inserter and modify its pickup method. However, I don't know how to extend the inserter nor which method to modify. Any he...