LEGO Technic 42214 C Model – Control+ Race Truck

[Paul B Technic]

This build is a C Model of LEGO Technic set 42214 Lamborghini Revuelto, and for me it represents one of the most enjoyable challenges I’ve taken on with a Technic set so far.

After completing the A model, I decided to completely break it down and challenge myself to design a Control+ powered C model. This was my first custom C model using the Control+ system, and that alone introduced a whole new set of design considerations.

Key Features
Despite being a C model, this Race Truck retains many of the standout features of the original set, and adds some new ones.
- Control+ drive and steering, using the same electronics as the A model
- Front and rear working lights.
- Opening cabin doors.
- Tilting cabin, adding both realism and play value.

Design & Build Process
The biggest challenge early on was ensuring the Control+ functions worked exactly as intended. With the Control+ hubs, and cables for the lights to think about, I spent a fair bit of time testing and refining the drivetrain and steering before moving on to aesthetics.

Once I was happy with how the Control+ system behaved, I focused on designing the cab and bodywork. The cabin, in particular, required quite a bit of experimentation. With a limited parts palette to work from, I had to be careful to make the best possible use of what was available while still achieving a clean, functional design.

After completing the cabin and being satisfied with its proportions and functionality, I moved on to finishing the rest of the body, including the rear wing, which really helps sell the race truck look.

Performance & Play Value
I’m genuinely impressed with how this model turned out. I managed to use the available parts efficiently, with very few spare pieces left over, which is always a good sign in a C model build.

In testing, the truck actually performs slightly better than the A model. The reduced weight gives it a bit more responsiveness when driving, and there’s also a fun and unexpected behaviour when reversing: if the steering is locked hard to one side, the rear wheels will spin, which adds a surprising and entertaining element to play.

Final Thoughts
Overall, this build was a great experience and a rewarding challenge. Designing a Control+ C model pushed me to think differently about structure, packaging, and function, and the end result feels both fun and refined. 

 

It’s another reminder that LEGO Technic sets aren’t just about what’s in the instructions, but what they can become.

If you enjoy taking sets apart and reimagining them, this is exactly the kind of project that makes Technic so satisfying.