3D printable parts format

Hi guys,

I wanted to print the new screwable bottom of the v1.1 reactors but my custom reactors have a wider vial_holder (top). So i need to make some changes to the 3D design. But this is not possible with the .3mf files. Are there alternative formats of these files like STEP or STL?

You should be able to export/convert the .3mf file to an .stl file with your slicer?

Does anyone have STEP file for these parts? I can’t edit 3mf files to the extent I need in onshape.