I changed the slot size from the original to be .15mm taller and .15mm wider to make it easier to put the square nuts into their slots

Original: https://www.thingiverse.com/thing:5366537

I will admit, I asked for this file because I broke two of mine and then about an hour later they released this so I guess I accomplished something pretty cool.

So when putting the square nuts into the slots I had struggles getting them in and it was SUPER tight and I almost lost them a couple times so I extended the slots .15mm taller and .15mm wider for a slightly easier fit, still tight mind you but it wasn't needing my full force to slide them in. Flip it 180 degrees and you can print it without supports. First 3 I printed I did at 20% infill and they broke while trying to put the nuts in the slots so I upped it to 40% and used cubic instead of Cura's Lightning and it works great now. Took about 30 minutes to print plus cooling and warming times.

Creality

Ender 3

No

No

40% Cubic