Hot Wheels Launcher with Printed Spring

A basic Hot Wheels launcher with room for improvement.   It works as is but several things could be improved including:

• Car position relative to paddle when launching needs to be adjusted with a second hand
• Spring tension is higher than it should be for smaller children

Print it and give it a shot.  I've included the STEP file if you would like to improve it on your own.

Print Settings

• Material: PETG (Needed for spring flexibility)
• Nozzle: 0.6mm (0.4 should work)
• Layer Height: 0.28mm (0.20 should work)
• Infill:
  • Spring: 100%
  • Others: 25%
• Wall Thickness: 1.8mm
• Top/Bottom Thickness: 1.12mm (Just stay close to this)
• Supports: No