Ender Rail Mounts

I wanted a mount for my rails to mount 3D printed utilities that didn't already have them. I figured some one else had made them but either my Googlefu is weak or no one bothered to share. Harrynibble's clips were the closest thing I could find to what I wanted.

I've never used blender (or any 3D software) before, and it was tricky to get what I wanted done.

Cura complains about an un-sliceable area but prints the item fine as the unsliceable area shouldn't be printed anyways..

Printed on a Ender 3 v2 Neo (not an option in list of printers yet).