Wiring a rack of off-the-shelf parts into one working product is never as simple as it looks. A vacuum generator, pumps, water and waste tanks, two cameras, an LTE link, and a battery bus each speak their own protocol; getting them to act as a single machine is the real engineering. Zeron built a full test-bed of the electronics in the lab and ran several months of development against it, proving every function before touching the vehicle. That let the software and the mechanics advance in parallel, which cut the schedule and raised quality. When the mechanics were ready, integration onto the product itself took four days, and the unit went out to field testing in London. Zero faults in the field so far. That comes from careful component selection and robust code.