Growth by coalescence of LMs is a commonly observed effect . For a computing device, the physical nature of the input and output signals should be exactly the same. When two LMs coalesce, the output mass is double a single input mass. Consequently, if colliding LMs at this higher speed, a splitting device would be required to reduce the mass of the output LM. The facile splitting of a LM using a superhydrophobic treated scalpel has previously been reported . By analysing the output paths of the LM collider, it becomes apparent that the gate could be modified to act as a 1-bit half-adder, with the possible outcomes demonstrated in figure . When a single LM traverses the system from the A or B channel, it finishes at the left or right extremes, the A B or ĀB path, respectively. Once the exit pathways are combined, this is analogous to the sum output on a half-adder. An initial trial confirming feasibility of this is shown in figure , where a single LM enters from the right channel, crosses the gap, and is reflected to exit on the right side.