I doubt if the U bolts need to be changed. They are pretty thick
metal. So if you lost .050 off them , they would not have lost a large
percentage of their strength. The Frame is a different story. It is
likely less than 1/8 inch thick when new. So losing .050 off the frame
may have cut the strength in half.

I would take a hammer and rap all over the frame to see if any parts
are nearly rusted thru. I helped repair a boat trailer that had
serious rust from being in salt water. I replaced the pieces that were
seriously rusted.


Dan