Printable rack: Modular, parametric ,for rack&pinion system for Reprap (Q42165)

This is an OpenScad script to generate modular and parametric racks, for a printable rack & pinion system for Reprap 3d printers, as a replacement for belts or threaded rods. More info here : http://www.kaosat.net/?p=1670 Please note that this is an experimental , work in progress version Edit 07/01/11: -Added the herringbone version , in wich you can set the center angle (see schematic), that script can also generate the straight teeth with an angle of 0 -this version is cleaned up and optimized, and much faster to compile so please use this one preferably -i haven't printed this one yet, and i am not 100% if all is ok Edit 04/01/11: -just a short video of a very very basic "platform" movement test : http://www.youtube.com/watch?v=8_KtJL7Gmto -for testing simplicity, the motor is on top , but would ideally be underneath the platform -i will try to have the herringbone version finished by next week