The idea here is that each rented excavator can be specifically tailored to the customer depending on his/her needs, experience, budget, and taste.
Some design inspiration and key sketches.
IRO - Modular Excavator

A modular compact excavator and service design for Wacker Neuson (a multinational company, that develops, produces and sells light and compact construction equipment and provides associated services).

The idea behind this concept is a series of different components with the same connection fitting to create just the right machine for the end user. The excavator shown is an example of one combination of components as well as a suggestion for the design language that could be used for the family of products.

Caleb Claassen
Industrial Designer Helsinki, Finland