Ouch! Bad memories.
I had a 5.2 where the shroud pulled right through a chain plate that was visibly in fine condition. Sling shot my 12-year-old son as she demasted.
Ronstan does not make the plate used in the 5.2 any more. Consequently, I ended up manufacturing a replacement from a mast tang that had the same dimensions as the chain plate. Only had to drill the necessary holes to mount.
Good Luck
Kris Hathaway
Nacra 6.0NA