RC FPV-Trike with rear steering wheel

As I had some spare parts from my first FPV Rover, I decided to build a RC car. But it shouldn't be just a standard RC car. Therefore I've designed a trike with a rear steering wheel.

Videos:
https://youtu.be/wLeIawSgQNw
 

Intructions and BOM can be found on Instructables.

https://www.instructables.com/id/RC-Trike-With-Rear-Steering-Wheel

The first Add-On for the Trike, a Nerf-Dart-Launcher
https://www.prusaprinters.org/prints/5378-nerf-dart-launcher-for-the-fpv-rover

Print instructions

I've printed all parts (beside the tires) in PETG. But any material is fine here. Tires are printed in TPU.

1x Body
1x Top part 1
1x Top part 2
1x Front fender left
1x Front fender right
1x Rear fender
1x Servo arm
2x Servo extension
1x Rear wheel attachment (Support needed)
1x Rear wheel
1x Rear tire (use TPU)
2x Front wheel
2x Front tire (use TPU)