Nacra 5.0 pre-1983 hull reinforcement

I found this article in a 1997 Performance Sailor magazine that came with my boat.
After reading it I began to notice my boat has all of the same repairs, even an upside down bolt in the front crossbeam...I don't have any issues. Just thought I would post this for future owners to be able to google.

83' NACRA 5.0
Previously owned H18, Trac 14, G-Cat 5.0, H14T
BYC, Mobile, AL