Bondtech BMG Prusa Linear Rail Carriage

Unfortunately, I don't know how to use 3D programs so I did my editing in the PrusaSlicer using negative volumes and cutting some parts from other models.

DO NOT SPLIT TO OBJECTS IN PRUSASLICER ( it will ruin the negative volumes) 

If you know how I can make the same changes to make an STL file let me know, ill be happy to redo it