[Jon01]

Originally Posted by Tom

His plate is sitting on and welded to the arm...the spindle pushes down, meaning all the force goes into the arm its sitting on....whats the safety issue here? And no, I don't build this stuff or weld, so I'm not being a smart ass.

Does the spindle push down on the arm or does the spring constantly try to pull the ball joint through the arm - putting constant changing loads on those welds.
Think about what's going on as you assemble this stuff a bit deeper - you have to use force to compress the spring and get the ball joint stud into the spindle. There's minimal downward pressure on the ball joint, rather the spring is constantly trying to tear it out of the control arm - the spindle/ball joint are all that's holding that spring in there and containing it's expansive force that's supporting the weight of the vehicle...
You're modifying their attaching point.
What happens when someone nails a pothole on the interstate, the weld fatigued control arm or gusset lets go and you lose it and wipe out a van of kids?

Sorry guys, this is where you lose me. Unsafe.
Spend the $ to buy the right parts designed to accomplish the task at hand.