I liked the original design by Alokin ( https://www.printables.com/model/83487-ender-3-3-pro-with-linear-rails-dual-z-mechanical-/remixes), but decided I wanted a shorter version. I took basic measurements form their design and drew my own version with support “ wings”. On my machine I've attached it using only the side screws as It seems sturdy enough without the center screw. STEP file also included.
The author remixed this model.