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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Hi, there is no step file, only STL files, because I designed this in Meshmixer. You can convert from STL to STEP using this process : https://youtu.be/avVNfIswkMU.

You could print the finger hinges with no infill and just perimeters, that way the fingers are looser and require less force to close.