To make this model better, we will replace the resistor representing the ther- mal coupling to space by an ABM block. In particular, we will use the ABM/I/2, which takes a differential voltage input and develops an output current based on some relation between those inputs. We will use the radiation formula directly (the area of the end of our bar is 0.785 in2), and maintain the 3K background radiation for the sink, as seen in Fig. 5. It is worth mentioning that R13 must remain to ensure the schematic has no floating nodes. To avoid a heat leak, we just make R13 obscenely big (1G). The results from the simulation of this system can be seen in Fig. 6. We can see that the system holds tightly to our expectations so far.