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You will need:
6 Big Gear 1
4 Small Gear 2
4 Small Gear 3
1 Heart
14 Connectors
You can also just print out the "All" file, it contains everything you need.
Print Settings:
Use a brim if you like. I used one only for the Gears.
Assembly:
You can just watch this Video: https://youtu.be/TF81TunrQ4Y
Push the Connectors into the Heart.
Then Push the Big Gears onto the faces that have the number 1. Then push all Small Gears 2 onto the faces with the number 2. Same with small Gear 3.
You then need to turn the Gears until the edges align everywhere.
Troubleshooting:
Watch this Video https://youtu.be/PWUoJc_Gc84
The Hearts in the troubleshooting folder have entirely wrong numbers on them. But they function perfectly fine.