hmmm well I wouldnt say most cut and turns are made before the pumkin, thats just one way of doing it
Beams are typically extended directly after the radius arms and cut and turned here as well, the point is to re-position the ball joints to allow you to run lift in the spring, no lift in the beam pivot (no or minimal drop bracket) and still have proper alignment (camber correction is what lifeguard is doing here)
Another option when cutting a turning like this is to extend the beam 4-4.5" also and run dana 44 axle stub shafts without needing to extend or buy custom shafts.
If you look at Giant motorsposrts, Camburg, or Autofab, etc their 4x4 beams are built this way, with the cut and turn aft the radius arm, simply re-locating ball joints so your beams can be at an angle at ride height but the camber is still aligned, no weak axle pivot drop brackets needed, the u joints at the knuckle are simply for steering, adjusting the ball joints here will not effect that U joint too much, they can take this correction
this is why many 4x4 ttb trucks look like they are already at full droop when they are sitting at ride height, the ball joint correction to allow this to happen.......if you do it perfect you will have 5-6" of coil lift, no axle pivot drop brackets, and your stock camber shims will be set at 0 correction