It saves as an Autocad dxf. I can save in Autocad 2010, 2007, 2004, 2000 or R12. I think the problem is the ellipses. I tried saving a dxf of just one of the three ellipses and couldn't get it to translate. Probably too many points for the converters to handle. I can approximate the ellipses pretty closely with circular arcs of the correct size chained together, but what a PITA of a way to do this.
Hmmmm. You got me thinking. I saved it out as an R12 dxf and it converted. It looks like about 130 point straight line approximation of the ellipse, but that is close enough for my purposes. I can get it from here. Thanks.