Summary

This bumper can easily be attached/detached on a bit:bot XL car from 4tronix.co.uk.
To remove spring releases that hook through holes in the circuit board. Be careful to glue spring releases on the correct side

Some care should be given to slide the bumper properly in place

The bumper prevents damage to the circuit board and allows for easy attachment of cardboard appendages (7mm corrugated)

To print without supports: Print bumper standing on 'headlights' and springs on the side

Use at your own risk ;)