I did the Esteps calibration today, told it to extrud 100mm and it was only off by 0.66mm
I thought that seemed pretty good, but made the proper adjustment anyway.
Printing out a train whistle now as a test,
http://www.thingiverse.com/thing:77183
Then I think I will print a mount for a second cooling fan for when I do PLA.
I am thinking about printing this one and seeing if I can mount if on the side of the extruder.
http://www.thingiverse.com/thing:351280