When printed all hinges should be moved carefully. Once it starts move it wil be OK.
Ears on top hinges are weakest part, be carefull with it at the beginning.
Bottom hinges are the hardest part to start moving.
3d model print parameters
layer 0.15mm nozzle 0.4mm
No ...support/brim needed Cooldown enabled Printed in HIPS (ABS is OK too)