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3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
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Thanks4nothing is right, this is not a model for tuning, its more like a model to prove you tuned it :)
Bed leveling squares, temp tower, flow tower, calibration cube, retraction test. That should be enough, but later on you can look into pressure advance and resonance calibration.
Its better to make your life easier by tuning model/orientation/settings with goal to avoid problems. Dont try the opposite, its easy to force printer to failure.
If your prints fail after 3 hours consistently it can be that your stepper driver is overheating and skipping steps. Easy fix, but that was just a guess, its better if you provide picture of failed print. Are you experiencing layer shift on other models?