Interesting comments :roll eyes:
I haven't replied lately as its been pretty still lately with no winds at anchor however will do if and when I find a solution ... before the neighbours ask me to turn my monotone harmonic guitar playing off.
My rig is due for a series of tensioning checks but presently waiting till the next port to have expert tackle this but essentially the main shrouds are good and tight.
I will try adjusting the mainsheet/topping lift
and see where this gets. Just need wind to re-enact it.
As for the Loos gauge, I have both 12mm and 14mm dia shrouds and understand Loose doesn't make a gauge for 14mm (correct me if Im wrong). Im still in the market for a 12mm or I just borrow from a neighbour.
We haven't a vang.
Thought about putting strakes (vortex repressors) on a few lengths of the shrouds to disturb the air flow which causes the vibration. In my previous life I engineered these for deepwater pipe spools in high current
areas. Perhaps hydrodynamics and aerodynamics play to a similar tune here....need to look more into this.
I will update when I get a solution.