Power pole erecting derrick

I built this model of a power pole erecting derrick to accompany my commercial electric company.  The prototype was an early device pulled by horses but my model is pulled by a truck and probably not long to remain in use.

The model is mostly wood with commercial wheels and thin wire for cables.

My model is not exact but I think captures the idea.

Above you can see the derrick lifting a pole.

Above you see the derrick next to the structure which gives an idea of size.

Next I will build a unique truck model.