Memory, firmware and digital modifications should be documented as part of the configuration

On digital or hybrid instruments, configuration is not limited to visible hardware. Firmware, ROMs, memory expansions, storage and internal modifications can change features and compatibility.

Before buying or selling, record the software version where verifiable, installed expansions and differences from standard configuration.

If an update is irreversible or requires specific hardware, treat it as a significant modification.

Keep legitimate backups and maintenance files where appropriate, without confusing installed content with the physical originality of the instrument.