About this 3D model

This uses the spreadsheet from http://www.thingiverse.com/thing:7881 as a design table for a Solidworks part. Tested from 3 to 100 teeth at pressure angles of 14.5, 20 and 25deg. Currently only does straight spur gears, but it's really easy in Sldwrks to make an internal or helical gear. I realize only a minority of people on this site use Solidworks. I use it a lot, and I'm all that matters in the end :)