If that's your threat model: - You are fucked - You are fucked, and there is nothing you can do about it - The government won't care about some chassis check -

If that's your threat model: - You are fucked - You are fucked, and there is nothing you can do about it - The government won't care about some chassis check - The government will use methods that nobody else has even considered possible yet - There is literally nothing you can do, unless you have the backing of another nation. I find it ridiculous that people build threat models around organisations with almost unlimited resources that will only care about you (enough to tamper with your hardware) if you have done something very, very wrong.