Cura profiles for the Biqu B1 SE Plus printer
To import these, just open the .3mf files in Cura using File->Open
The Biqu Haper profile was posted by Biqu Harper on the B1 SE Plus facebook group. Original source link to profile
The extra fast profiles are based on the extra fast profiles from Ultimaker for the Ultimaker S3/S5 printers. They however seem to work fine on this printer.