When Cura says that a print is estimated to need 19.2m, but once the print is done my calculations say that it actually took 30.1m, what am I to go by?? I have an Omni 3D (Anet clone) A8. I write down the “filament used” before & after a print and get numbers that are not even close to what Cura says. Print-time is within reason. Thanks in advance for any inputJeff