Troy came over tonight to weld the stress cracks in the frame where the steering gear box mounts. He was surprised we had missed these cracks before, too. There were a few more than he was expecting, but nothing as bad as what I have seen online.
We started by drilling a stop hole at the end of each crack to create a stress relief point and prevent if from spreading any further. Then we used the rotary tool to grind grooves/channels over each crack. This will allow the weld to spread out and cover the area.