Thanks, Adam and Sander!

Now, the news: The new and improved Bahtinov Mask Generator version 0.2!

Here's a list of changes - I think this will address everyone's issues.

Greatly simplified the generated SVG - seems to fix the Inkscape printing issues, as well as letting Adam adjust the left cutouts. See next item.
Horizontal stripes now start with a cutout on the center line - since apparently this *is* important.
Added parameter for controlling number of horizontal cutouts.
Decoupled the structural bar thickness from edge thickness; added a parameter for specifying the thickness of the structural bars (the up/down and left/right bars).
Added optional "center line" crosshairs for alignment/testing purposes.
Elimated "bumps" on outside of circle at the intersection with the structural bars.
Fixed the background/fill colors so they work completely.
I changed "Submit" to "Generate!" because I thought it was more exciting that way.
Decoupled the margin from the edge thickness; added a parameters for left and top margins. Width and height are now calculated as aperture + (2 * edge thickness) + (2 * appropriate margin).
Added a parameter for the angle of the angled cutouts.

Let me know...
David