As you can see, it would take a LOT of reinforcement to get even close to the strength of steel, so this would probably only be a good idea to 3d-print if you aren’t using this for loads greater than 10N (If the load is applied in the same way as the simulation)
Oh, btw, the simulation results I provided is displaying the safety factor of the part. The safety factor of my part isn’t significant, I just needed something to illustrate the difference between the ABS part and original steel part.
Thank you so much for all of the great information!
Now that I have it I need some simple instructions to figure out where I screw in the rack gears. If the rack gears are on top, and the ribs are facing to the bottom, where and how do the trucks go?