Q: Is the turnkey build better than buying INVINCIBLE parts piece by piece?

Depends on your patience. Every INVINCIBLE component is a direct bolt-on, so a staged build works and many owners go that route. The FULL build buys you what piecemeal cannot: a truck engineered and assembled as one system by the people who designed the parts, delivered done. No installation scheduling, no compatibility homework across a dozen orders. If the end goal is the complete truck, ordering it as one build avoids that overhead.