Why these numbers
LANDU Refill Hyper PETG starts from Bambu's PETG Basic reference; LANDU's published specs are overlaid where available, and everything else stays at Bambu's calibrated default.
Same formulation; refillable-spool format. Speed envelope 40–200 published (vs 300 marketing claim)
Treat these as a starting point — run a flow-test cube and Bambu's Flow Dynamics calibration after import for the last few percent.