Allowable backlash

I would think that if one of them has a lathe,an operator, and the right sized drill and reamer,you'd be over 3/4s of the way home-free; but like I said, I didn't watch,so what do I know,lol.
It don't have to be pretty .It can be prettied up after it gets home, if a guy felt the need. I didn't. As long as the new material clears the pinion,and doesn't interfere with the pinion washers, yur good to go.
For me the modest cost to repair the 5 of them was less than the cost of just one new SG; maybe closer to half the cost..

But, I guess.......... if the saddles were that bad, it might be prudent to also check the splines on the axles,the side-gears, and the cone-clutches.