Shortly after, my x belt kept jumping and skipping teeth. That was freakin awesome. The jumping could be dealt with pretty easily but skipping teeth makes it so the center moves while it's printing like in this cropped version of the image I posted before:
You can see it drifting to the left in a star shaped coil. Nice. On closer inspection with a magnifrier, I discovered the belt doesn't mate perfectly to the gear. I posted the picture before out of anger and walked away from the thing a awhile thinking I was going to have to rebuild the x axis.
When I came back to it and started taking it apart, I saw the mounting screw was binding the tensioning pulley. I loosened it up and made a little guide to keep the belt from being thrown and viola!
I could then adjust my x so it and the y could make square objects. This took some trial and error since I don't really know the pitch of the x belt. The result seems within about 5% error.
As one can see in that video, it wouldn't be hard to actually make this a working plotter or cnc machine or laser cutter..
I would also like to note that with microstepping working, the motors are considerably quieter.
Note to selfdude:
jumper Yes/No step size 1 2 3 no no no full step yes no no half step no yes no 1/4 step yes yes no 1/8 step yes yes yes 1/16 step