@ Gkiing I'm splitting the condenser, but the one up top is used to kind of subcool the 2nd stage gas before it gets to the interstage HX The vapor that doesn't condense in the condenser rises to the top and goes to this through the ones in the side and out the bottom so it's cooled by the suction line going back to the compressor through the middle of it. Also could you explain what you mean by how I could control it's flow back in to the compressor? The drawing I have has nothing on it, but a strait line back to the compressor. Is there something i'm missing in my creation?