Re: Hats off to them...
It does take some balls. It only takes one person with the knowledge to build the computers. All that is needed is the Case, M/B, CPU, RAM, a network cable, a hard drive, and the means to install the O/S. Everything else is already available on the M/B.
Given that the prisoners were already disassembling computers, reversing the process to build them is simple. Getting access to the network switch to do the deed is about the hardest part, or it should have been. That suggests that there was a network physical security failure, and that somebody's posterior should have been very sore from the punishment inflicted.