About that option. It is the Mahayna and the enclosure looks exactly like the one linked below. Could I sell one? I've never looked into what is legal and not legal about selling.
A few weeks ago @MichaelW sent me some parts I needed to finish a build that Tayda was out of. That was awesome enough but he also included 2 PCBs also! This is one of them now built. I got to try out my new Auditorium Test Platform for the first time too. I had one of the original Zen's from...
forum.pedalpcb.com
It's not like you're putting that into production and trying to sell 100s of them. I'm sure
@Robert is okay with you building one or even a bunch of Mahayna pedals and selling it/them peer-to-peer. It gets his brand out there.
Just don't misrepresent it in anyway.
Now if you took Hermida's chosen font, name and graphic and started selling "Joe's Zendrive" ... I'm sure you'd be hearing from some lawyers posthaste.
Not many circuits are patented, (some are) but for the ones that are patentless we can copy them. However, the circuit's layout, the pedal's cover-art and its name are all copyrighted or trademarked — so we must pave our own roads (PCB-traces) to get the signal from A>B and not copy others' roadmaps/layouts etc.
That's just my layman's understanding of most of the world's legal concept regarding pedal copies.
You can find many other threads on the legalities of cloning and selling, elsewhere.
Personally, typically, I don't copy the original pedal's name or art, even if only for personal use. I'd rather come up with something that's either a tip-o-the-hat to the original or completely different and unrelated.