With the introduction of the new Prusa MK3(S) frame, I wanted to make my MK2.5S similarly rigid, if not more so. There were a couple great options, such as this:
https://www.thingiverse.com/thing:1656945
This design and others came with two issues. Firstly, they all required complete disassembly of the Y-axis. And secondly, even if I did use one of their designs, the setup wouldn't work with this Y-axis upgrade I'm planning to install:
https://www.thingiverse.com/thing:2836470
This solves both problems by being a drop-in solution; no Y-axis disassembly required. And it really does make the entire frame stiffer.
Other than the printed parts you will need:
Two 14.5" lengths of 5/16" threaded rod
Eight 5/16" nuts
Six 5/16" washers
Four M3x20 screws
Four M3 nuts
Optional: Plastic tubing with 5/16" ID
I personally used the following settings: PETG, 5 perimeters, 20% cubic infill, and 0.2mm layer height. You can use any filament, as long as it's fairly stiff after printing. I had some Proto Pasta CFPLA in my bin, but that seemed a little overkill at the time.
Print as oriented in the files for the stiffest part
The author marked this model as their own original creation. Imported from Thingiverse.