If you add material type to your compenents in Fusion 360 it will give you weight, density, etc. You can even run some kinematics on it to see what kind of load it will sustain.
I wondered about that after I posted it. Looks like the current setup is about 11.2#. Not sure how that compares to a stock spindle, but I have read that an F-body spindle is 3# lighter than an A-Body one. But no actual weights to compare.
The real apples to apples would be spindle and hub weights.
I will have to look around and see if I can figure out how to check the strength. What I should do is send it off to a design firm and have it analyzed. But that’s for the bucks up guys. :p