Changelog for inkscape-gears-dev-20111211_jw3-1.50.noarch.rpm :

* Thu May 09 2013 jwAATTsuse.com- update URLs,- renamed inkscape-extensions-gears-dev to inkscape-gears-dev
* Fri Apr 12 2013 jwAATTsuse.com- extended_ranges.patch added max. 360 teeth was too low for 366 outer wheel of an astrolabium.- selectable_accuracy.patch high accuracy of involute is not needed with large tooth counts. It just gets extremly slow. Allow lowered settings.- metric_module.patch Add an option to select metric units system and module, instead of circular pitch.
* Tue Apr 02 2013 jwAATTsuse.com- an improvement over the original inkscape extension gears It adds holes to the gear (central hole for the shaft and some radial holes to make gear lighter).
* More accurate tooth profile. In earlier versions the involute curve was approximated by only three points; now by 15 (can be modified in the source code)
* Center cross (easy for aligning); off by default, can be turned on
* Pitch circle (easy for meshing; circles should touch for meshing gears); off by defalut can be turned on
* Info: in the SVG there is now an extra field telling a little about the gear (easy if you want to make a meshing gear but you forgot the settings used)