Redesigned Race car

I downloaded a race car to print for my great-grandson. It was 'problematic', so I made some design changes to the wheels because they didn't want to turn, I cut out the cockpit and made my own using internet stls and svgs. I also added a rather large motor as the 3-year-old boy ordered me to. LOL. I have no pics of the actual build because after our weekend, he took it home. The wheel hubs, locks, tire lettering, and mags are the only things that are of my 'own' design. If the real designer happens to notice, please identify yourself. I had no plans to post it until I saw the boy play with it. This car has been leveled up in size by 185% of the original stl.