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Switchable chassis/IEC grounds are dangerous and should not be implemented on any piece of gear, due to both legal and safety reasons. I have not heard anyone claim that the device in the photo does not contain a switchable chassis ground. And as such, the piece of gear depicted in the photograph is unsafe and is also illegal in most countries. That is a fact which is not debatable. Whether or not other HCL preamps are safe or not is not being explicitly questioned. The fact that another HCL product passes a tech's safety assessment is not pertinent to this discussion.
Switched chassis ground = dangerous and illegal.
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