I designed a new test print last week. The bottom (longest) section is printed with 400 micron layers; the middle section with 200 micron layers, and the top section has 100 micron layers. Each section is 4mm thick.
Here are some pics of it:
http://samanna.net/3dpb/400.200.100.overall.png
http://samanna.net/3dpb/400.200.100.overall.png
http://samanna.net/3dpb/400.200.100.bump_side.png
http://samanna.net/3dpb/400.200.100.bump_side.png
http://samanna.net/3dpb/400.200.100.angle_side.png
http://samanna.net/3dpb/400.200.100.angle_side.png