My damper/haptics make a slight noise — is that normal?

Several “is this normal?” tickets, all confirmed fine:

• Light hydraulic damper noise — normal, even on brand-new dampers.
• An air-like “squish” from a damper — normal.
• Occasional carbon-plate cracking noises under foot pressure — normal (very tight tolerances).
• General operation noises on aluminium-profile rigs — normal; many moving parts and material contacts.