Quick fix for your IKEA Vilmar chairs.

Drawing optimized for 3D printing, with thicker walls than original, and with the correct printing orientation, i expect it to last longer than the original.

To print I prefer 0,8 nozzle because it's way faster and also stronger, but with a 0,4mm nozzle works also.
PETG is preferred, PLA should also work.
If you need to slice them for yourself, please use 6 perimeters (this is to ensure the model is solid)
The author marked this model as their own original creation.