This is not a calibration model, it's intended for use once you already have your Pressure Advance (aka Linear Advance) tuned and you are ready to fine tune it with a more advanced challenge.

The outer facets are designed to visualize corner bulge (PA setting too low) vs over-smoothing (PA setting too high). The concave curved surfaces are designed to visualize any issues with blobs. The peaks test stringing, filament dryness, and small-layer cooling.

Can be printed with zero bottom layers to conserve filament.