MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
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I like your design very much but I found some failure while slicing with S3D
It seems that the "top holder" was made from three seperated parts - S3D now tries to slice them but leave gaps beneath the pins :(
I fixed it with first seperated the part and then sliced it as three parts overlapping.
Just for your info ;)