MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

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What software are you using? I use Simplify3D. Maybe try scaling it down to 98%? I must save I have a very, very large head and it fits fine at 99% so I don't think you would have any problem at 98%.