The ignition key and the tab that locks the battery compartment are often broken on used Tomy Racing Turbo models. The 3D-printed key is a drop-in replacement for the original key. For the tab, the original metal part holding the original tab in place needs to be removed and replaced with an M3 countersunk head bolt on the outside, and a lock nut on the inside.
The author marked this model as their own original creation.