Agree--the concept is good, but it needs a better (refined) design. Certainly a radius would help immensely, as would  a good polish to minimize abrasion.

A good jig is worth its weight in gold... 

 Here's what I mean. I have to "finish" the bends to get the ends to meet.  https://pomf2.lain.la/f/axle0dyt.jpg https://pomf2.lain.la/f/axle0dyt.jpg 

 Oh...wow...that's a mile alway. No wonder you get the abrasion trying to get it aligned.

Why is it so far off? (Feeling like you need a jig to ensure the initial bends are spot on...)