Constructing part three - match box with thin pencil lead

We curved the copper wires into a smaller circle for connecting the pencil lead easily and prevent them from breaking away.

However, the process was not as successful as we have expected, because the pencil leads are too thin and weak that cannot afford the weight of the copper wires. 

As a result, we have wasted a lot of pencil lead in this building process. So we are considering about making some improvement by using a thicker pencil lead.