.dxf files Keyball61 - not correct dimensions?

[jbnjohnathan]

I wanted to create my own wrist support, and to make it fit nicely with the keyball61 I downloaded the .dxf files for the acrylic bottom.
However when I import it into Autodesk Fusion, regardless if I select mm or inches as unit, it is not the correct size.

If it was possible to also add .STEP exports for these parts that would be very useful.

https://github.com/Yowkees/keyball/blob/main/keyball61/design_data/Keyball61_Rev1_BallSide_Bottom_Acryl_Clear2mm.dxf
https://github.com/Yowkees/keyball/blob/main/keyball61/design_data/Keyball61_Rev1_NoBallSide_Bottom_Acryl_Clear2mm.dxf

Thank you