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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H ishaan,
thanks for your message requesting help with the setup. A MK7 drive gear with 12mm OD and 11mm D on the hobbed part seems a bit strange, but decreasing drive_gear_hobbed_radius to, for instance 9.00 / 2, and reprinting the idler could do the job.
Regards, schlotzz