This is about over night parking. During race heats the A-cat sailors do something different.
Of course I will have the same problem as some of you in a few weeks. It will be difficult for me to drop the mast each time.
The two boats next to me are an widened A-cat and a 18 square. Both with carbon wingmasts.
Both of them have put 4 rests into the ground on which the boat is layed up and fixed. Than they hoist two extra lines to the spreaders and use that line to support the mast. They force rotate their mast to the prevaling wind direction (south east where I am) and fix it there. Than they use the main halyard to put the tip of the mast under tension.
Together this seems to totally prevent any oscillation and their mast are totally undamaged for years now. I do know of an A-cat that didn't do this and had the diamond wires pulled out due to oscillation.
I think I will try to make a picture of the setup they use and I have to ask about the specifics too (for my own boat).
But that is how they appear to be doing it.
Wouter