There is nothing wrong with Orange Pill case and you can change it anytime if you do it carefully.
I can change it whenever I want, but I don't want to wait 2+ weeks again nor to pay 20+ EUR for a case. The one I have does the job nevertheless. No, I don't have a 3D printer.Any device that have RNG option is not really generating true random results that can't be reproduced, that is why we have TRNG
Seriously though, why isn't an RNG generating true random results, and if it isn't, which opens up a philosophical question, why does the TRNG, indeed, generate true randomness? To be precise, urandom is a Cryptographically Secure Pseudorandom Number Generator (CSPRNG), and to be honest, I'm a complete noob when it comes to this field, but I somewhat agree with this perspective.