So I managed to move two 100% speed (process time 1) belts over one another using 4 crossroads. Unfortunately, this only works if you have process time 2 machines directly before or after the crossing point on each side, because otherwise you create loops and belt loops cause the game to freak out (might make a bug thread about that, we’ll see). Anyways, if you do use process time 2 machines immediately before and after the crossing point, it works. Here’s a 1080p60 video to display it in all its glory (may have been a bit overkill on the quality :P):
mesmerizing indeed.