Working sizing
thingiverse
This file aims at replacing the original "sizing" file which, for some reason, isn't flat and therefore won't adhere to the bed and print correctly. Hope that can help you, and if it does, post a comment/make!
Download Model from thingiverse
With this file you will be able to print Working sizing with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Working sizing.