Here is Ivan making a 180 degree angle, or straight line. Not very straight, is it?

Maybe if I increase the diameter of Ivan's planetary gears then Ivan's NEMA 17 stepper motors will fit in the beige and gray angle bends and the cyan straight sections can be removed? Larger diameter also means we can up the gear ratio of the planetary gears from 3:1 to 4:1 or perhaps 5:1. There is an upper limit, though, because my printer only has a 6" cubed build volume so the outside diameter of the blue gear cannot exceed 6" which is 152.4mm. With skirt as part of the printing process that number is more like 140mm.