This column GPU support was designed to be adjustable from 2.75in (70mm) to 3.2 inches (81mm). It works well supporting a heavy RX7800 XT. Print the 2 parts with the round base on the build plate. Supports are not required. Thread tolerance is 0.15mm for each side. Contact me if you have different measurements, these are what worked well for my girlfriends PC. Her idea was to have an ancient dragon who live inside her PC, and she wanted some ancient ruins vibes for the dragon's nest. I may make a version that has less grooves so they show up better on the print, but for now I like how they look.