Hi @camershak,
I wouldn’t really agree with that - we freely provide the electronic and software design files, including a schematic of the ESC it uses, and the firmware source (in case you want to modify the behaviour). There’s also active discussion on jaw modifications/alternatives elsewhere on the forum
I don’t expect that should be particularly difficult. We sell the cable by the meter, but if you’re extending it quite a bit I’d recommend checking our Voltage Drop Calculator to ensure the cable can provide sufficient power. The internal ESC uses the same insulation displacement connectors as our Lumen PCBs, so your replacement may not even require soldering:
Photo by @cwnetdev, from a previous support request
It’s possible that the most involved part of the cable replacement would be replicating the connections on the inside of your electronics enclosure, although you may be able to re-use the existing connectors by cutting off short lengths of the existing wires and splicing them onto the ends of the new cable wires.
Do take care to keep the o-rings clean when disassembling/reassembling, to avoid creating a leak point
Our WetLink Penetrator technical details specify that the bulkheads and plugs are reusable (a few times), but the seals are single-use, so you would indeed need to replace those.