I'm trying to import a DXF output into AutoCad 14. The result is a much too small drawing with large letters.

Import DXF

Winfoil automatically formats numbers according to your Regional Number Format Settings in Control Panel. A number of Windows programs do not do this and always treat numbers as being in United States or English format. An option is provided in Winfoil to automatically convert all DXF files to format numbers in English or US format. To do this;
1.Go into the Preferences screen from the File Preferences menu.
2.Click on the DXF Export Tab.
3.Check the US English Number Format Checkbox.
4.Click on the OK button below.
Try the export again and it should be ok.