I see. Thank you for taking the time to explain it.

This may be because I do not understand the circuits limitations. I will run the editor and delete the post if it is a design limitation.

I was trying to fill one stack of an item type from a chest to a wagon. However the inserter always inserts 12 (max stack size) instead of the required amount when the train just arrived. That's because I am sending the stack size S when the train id T > 0. However when the train just arrived the ...