frame
I lost my first runner, 2002, to the same issue, but worse, along with the control arm , I had a long crack along the rail and my shock towers were in bad shape,. One welder said it could be fixed, one said no way and with the rest of the frame not looking great, I sold it to a person with full disclosure who is basically using as a farm truck.
Not to be dismayed, I set my search out and saw a few with that issue that were described as "frame in great shape".
Finally found one with a pretty clean frame, lived half its live in AZ, but I could see that down the line I might have that same issue, just on the passenger side, the rest of the frame was in very good condition.
After speaking with a welder, I decide to be preemptive and did basically the same thing you have there, They made the plates as well. My weld was not nearly as extensive as yours, a re enforcement is a better way to put it
I had the rest of the frame inspected, no issues, threw some under coating on it . Worth it to me as it's a great condition Desert Dune that runs perfectly, but I'm in the NE, so it something we just live with.
Glad you were able to save yours.