First shot at making some meshing gears. Using the dev version of inkscape extension.

I think the results are plausible for very light duty (things turn, at least). But the smaller gears at least will need kerf adjustment, and the drawings will need tweaking to get rid of double-cutting. My plan is to make the hubs bigger and glue them down before cutting, then add a little lube. For scale, the smallest gear is about 5/8 diameter.