It would be this simple in my opinion: Sell the unit configured (and marketed) as a webserver (etc.) and ship it with a firmware with some web hosting features. Than offer an ALTERNATE firmware which can mine Bitcoin on the side and/or dedicated.
I think after this it would be justifiable as a general purpose computer. But most of this up to the manufacturer and Bitmain is doing KYC for a while (just as an example what can be expected from the manufacturer).
Has anybody won the argument with Fed-Ex that since they were responsible for dealing with customs, and errors in paperwork are on them?
Unfortunately CBP claims that it was not categorized correctly. So it never was 0%, but YOU did not report it correctly (or the shipping company acting on your behalf). Hence it is your error and there is practcally no limit how long they can go back (according to our customs agent).
It is questionable as their "ruling" came out later, so how should we know?
We should (according to them) be happy that they "only" charge the actual percentage and not a fine (yet).