Suggestions on strengthening jack attach point.

Ran into the same problem with our 76 Amerigo (except worse) During the re-build we place a piece of angle iron the entire length of the TC and used a 1/8 plate of steel 20x20 where the actual jack is screwed into. Of course all of the wood is replaced, since this is a TOTAL re-build. I am hoping this will take this camper another 40 years into the future.