Why these numbers
LANDU 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.
"Up to 300 mm/s" optimised; high transparency. Refill variant publishes the spec block
Treat these as a starting point — run a flow-test cube and Bambu's Flow Dynamics calibration after import for the last few percent.