Sooooooo. I managed to get the stl output from jsketcher working and added a print button to the cad model pages in the web site. It is all working well now.
You don't evin need any cad software on your machine. Just a web browser.
Design your model on the web site.
Select your slicer settings.
Approve model for printing.
Get an email when its complete.
I think we have managed to get the trifecta with this one.