Giu,
I tried your method and it works brilliantly. Te only problem I had was that my mast got struck in the muddy bottom when I was knockroached and the boat stayed upside down. It was uncomfortable swimming through the companionway into the boat, but I had to wash myself anyway (Yes wash myself every month weather needed or not).
In the morning I just cut the mast loose to right the boat.
By the way, can I use the
anchor chain instead of the cut shrouds?