Anyone can follow these guides with minimal tools and setup.
Slightly more involved than Level 1. May require some setup and tools, but still very accessible.
Requires some familiarity and patience, along with certain specialist tools and components.
You’ll need solid tools, time, and confidence. This is where the builds get serious, with specialist components and skills often required.
Significant time and skill are required. This is full‑on engineering, demanding specialist tools and advanced techniques. Some components may be hazardous if mishandled, so a high level of competence is essential.
This category is reserved for the most complex projects and challenges, often research‑grade engineering work requiring deep expertise, precision, and confidence.