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Maybe you scaled the house down when you put it on your build plate - what size is the base of the house that you printed in mm?
The house should be 150.75mm x 106.494mm (and 90mm high)
The bung should be 55.518mm x 55.518mm x ( 9mm thick)
If you scaled the house to fit on a 100x100 build plate, the bung will need to be scaled to 36.83 x 36.83 x 5.97