Whew, Lost the last thing...
If you're forced to use cheap U-Bolts that come with the Overly-Wide, flat, "Oblong-holed" Shackles, you probably know that the cheap U-Bolts spread apart under use. These Shackle inserts will add a surprising amount of lateral strength to keep the free ends of your U-Bolts straight and aligned.

These fit 5/16ths Inch, by 1-3/4ths, by 4-3/16ths Inch (7.95 mm X 44.45mm X 106.36mm) U-Bolt shackles, but can be scaled to fit larger or smaller sized U-Bolts.

Creality

Ender 3

No

No

0.20

100

Let's keep it real here, you're using plastic to try to keep cheap metal straight... So, It is what it is...

Please toss us a motivational "Like" if you find this useful :)

I took a picture of the cheap U-Bolt, edited the size until it matched the size of the actual Cheap U-Bolt, Imported the pic into 3D Builder, and used it as a template to make initial design, curves, etc easier/faster... That method seems to be working so far.. We'll see.