Keeping original parts changes how a modification is viewed

If you replace a component for practical use, retain the original parts whenever it is sensible to do so. Label them and document which instrument they came from.

A future buyer may want to restore the previous configuration or simply verify the history of the intervention.

Keeping the parts does not erase the modification, but it reduces information loss and can materially improve real reversibility.

Do not reinstall deteriorated or unsafe parts simply to claim “original”; originality and safety must be treated separately.