The model has many non-manifold edges. I run it through https://makeprintable.com/ and was able to repair it. This should work, Here is a fixed file: https://drive.google.com/file/d/0B-702hnJJYE_ZEhLX05uM1VENGM/view?usp=sharing
Let me know if this solves your problem.
I'm thinking you're printing at .2mm Layer Height and .3mm Initial Layer Height.
This tends to offset the layers by .1mm accounting for the runover from 1.6mm to 1.7mm.
Two things to try:
1. Print at .1mm layer height (better quality prints, but twice the print time)
2. Set .2mm Initial Layer Height. You may have issues getting the prints to stick to the bed pending on your printer, filamant, bed adhesion type...
Link to post
Share on other sites