Here's my spin on an ikea Tertial base replacement. I found other designs too sharp and angular and thought I could make one myself, so i did.

This design is modelled after the original tertial base. It features countersunk holes (which might need tweaking, hmu if you like) and rounded edges for a nice smooth look and feel. It works with the desk clamp too!

I printed this in the official creality PLA at 0.16mm layer height with 3 + 1 alternating wall and a 30% gyroid infill on my Ender 3 V2 Neo, results in the pics.

Not much else to say about it, enjoy :)