Cylinder Test

This object should be used to fine tune your slicer and printer.
I printed the famous 0.5mm thin wall ( http://www.thingiverse.com/thing:5573 ), and when the measures were OK I printed some cylinders, and discovered that the measure of the cylinders were wrong, but the box was OK. In order to fine tune the slicer I created this object.
It is a 40mm x 10mm x 3mm base with 6 cylinders on it, they are alternate, one with a hole, one not,with the following sizes: 3mm, 3mm, 4mm, 4mm, 5mm, 5mm.