When exporting from MoI what are you setting options as? 1 unit in MoI = ??? Etc….

Are you drawing in MoI from the start in cm? (MoI has an option to scale on unit system change which can be unticked also. So if you are changing units for the export, it could be goofing there…)

Try resetting the sheetcam custom scaling dialogue back to 25.4 then getting out of the custom and use the inch or metric options. To match MoI export settings.

Sounds like sheetcam is reading it as mm…

So you can also convert to mm in MoI before export.

Or set scale factor of “1 MoI unit” in export dialogue to readout the other end scaled to the mm 10 factor