Here is my modification of the Technic 42039 set. This is a Toyota GT-One TS020 Racing Car. The chassis, wheels, engine, cockpit and technic functions to raise the doors & back end are the same as 42039 but the bodywork is changed to look more like the GT-One. Let me know what you think if you like.

Here's a summary of the LEGO news about the modified Technic set.

LEGO enthusiast /u/Andy-Ps-Bricks has created a custom modification of the Technic set 42039, transforming it into a Toyota GT-One TS020 Racing Car. The modification retains the original chassis, wheels, engine, cockpit, and functional elements of set 42039, such as the ability to raise the doors and back end. The primary change is the bodywork, which has been redesigned to resemble the GT-One racing car.

The creator has kept the core functionality of the original set intact. This includes the Technic functions that allow for the doors and the back end to be raised. The focus of the modification was to alter the exterior appearance of the set to more closely match the Toyota GT-One TS020 Racing Car.

This custom build showcases the versatility of LEGO Technic sets and the creativity of LEGO fans. The modification demonstrates how builders can adapt existing sets to create unique models.

If you enjoy building and modifying LEGO sets, you might find a LEGO Technic set to be a great starting point for your own custom creations.