About this 3D model

This part can replace the small 4mm yellow bushing/spacer in the Lego NXT kits that is so easy to lose. I did it with my limited knowledge of 3d modelling. The scanned version of the actual part does not print well in my Replicator 2 due to the flange at the top. (I updated the file May 30 2014 to make it exactly 4mm, it was off by 0.08mm)