Salina 48: Salina 48 Weather Helm

[Amaranth]

I have a 3 year old Salina that I cannot get balanced and have strong weather helm which any adjustment to the sail configuration seems not to alter.

Most interesting is that even on a broad reach with just a screecher up I still have weather helm ( ie no main at all)

The auto helm constantly fights this and when steering by hand there is a constant driving down with stalling of the rudders completly if you do not genteelly coax her back to the desired coarse.

I am firstly wondering if any other Salina owners have experienced this and what they have done . Further if any other similar cruising cat owners have experienced such an issue and have any ideas that could assist.

Other points of possible relevance. I have 2 Auto props and it makes no difference if these are in gear or running free.
The rudder bearings have been checked and are fine and the rudders seem squarely lined up

Thanks in advance for the fantastic support

[SVI]

My Salina has a weather helm (going into the wind) only when you have too much wind in the main, not reefed. Not much, up to 5 degree on AP.
Otherwise she is completely neutral.