RC Car Axle (for New Bright Blazer Car)

Twenty years ago my son's RC car's axle broke. I tried Liquid Weld, and I tried to create a new part from the axle on the other side by creating a cast in play dough, but that didn't work.

Somehow I managed to keep all the old parts for almost a quarter century, and today sketched up a near-perfect replica in Fusion 360 and then printed it on my Ender-3. It fits exactly the matching part on the other side (i.e., the one that didn't fail). One of the pictures shows the original part from the o