John 3:16 RBS rev d Rolling Ball Sculpture Marble Run Machine

I revised the John 3:16 RBS rev c to include extra bracing so that it did not need support when 3d printed. I also removed one brace that was a problem with that rev.

The marbles and the track will probably need to be lightly sanded so that the marbles do not bounce off the track. I found it useful to roll the marble between the fingers to find bumps that need to be sanded. Running your finger over the track will help find bumps that need to be sanded. The marbles still bounce down the tr