I miss 123d Design (the Fillet master)

 From:  stefano (LIGHTWAVE)
9952.4 In reply to 9952.3 
Hi pilou, when I evaluated designspark (among others) I had to rule it out as the import formats seemed
really limited, no pdf or dxf on import. People on forums from 3 years ago asking. Maybe it's coming as dxf and pdf are now export formats in v5 and they already import in designspark ecad which is developed by easypc/numerical innovations/pulsonix.

https://designspark.zendesk.com/hc/en-us/articles/211943145-What-are-the-import-and-export-formats-available-