I couldn't improve on what you got using raster, and yes going hybrid... well I just forced quit before it finished.
Definitely changing the line size for the model view helps but it looks like you have already got it turned down as far as it would go.
Have you looked at your output yet--printed at best output?
Besides going to a real CAD package, if you have to get by with this, print to pdf at higher scale and reduce the image to print?