About this 3D model

Marked as a Remix but I made it from scratch (my first openscad model ever), and It has a little different detail: the flats of the motor shaft doesn't go all the way. This is an scad model of the cheap stepper motors found on ebay/dx. (http://dx.com/p/28ybt-48-stepper-motor-with-uln2003-driver-dc-5v-126409) Part number 28BYJ-48 I intend to use it to build this cat feeder: http://www.thingiverse.com/thing:27854. Use it to model your stuff! Modeled after real measures and this data sheet: http://robocraft.ru/files/datasheet/28BYJ-48.pdf