I mean who cares about one offs right? Those don’t really hurt anybody. I worked there lab as a technician mostly handling test and repair on the channel strips for the consoles. I’d guess you could probably get away with shifting the look of the knob a bit and I’m sure it gets more technical but the paperwork for their trademark on the knob/s was framed and hung near the offices. The popular clones don’t have knobs that look so close to the same. I’m not a lawyer, just a tech trying to point out what I vaguely remember seeing. I’m not sure China cares. You can get them to copy almost any form through Alibaba.
The machining looks great though 👍