There are 2.2 pounds per kilogram so 160 kilograms is 352 pounds. That is a lot of weight on an A cat. I have sailed with my wife on my Boyer Mark IV with a total of about 300 pounds and flew the hull without trapezing. I did not like how much flex I was seeing in the leward hulls in front of the main beam going upwind in a small chop so I stayed off the trapeze. At 330 pounds you are twice the weight of the boat - that would be like putting 810 pounds on a Hobie 18 except that almost all that weight difference between the boats went into the hulls and rigging of the Hobie so that it could take the abuse. I think that A cats are built to take very little abuse, if any. SO, how important is it to keep it in one piece and how much insurance do you have?