An idea that someone told me with reguards to printed parts. We can print almost any shape but strength isn't always available with this material. Sometimes you can cheat a bit by having hollow pockets or incorporating inexpensive, easy to find hardware store aluminum or steel, that can be hidden inside a printed part. Ya know , basically printing parts that can be glued together around even just a metal rod. Kind of takes the design up a few levels of hair pulling
. But can add strength if needed. I'm still just amazed at the seemingly endless possibilities of what we can make, and what great ideas guys like you share!! Cool pics of those back ends too, thanks.