Tardis Hanger or Coaster

If you use the individual STL files, ensure you center each one individually The assembled STLs (Full TARDIS Flat.STL is preassembled/centered, just insure you flip the model 180 degrees on the y axis and so that the front is face down on the print surface. .3mf file is from a Kobra 3 Max, but should import/load without issue in most slicers.