Hydraulic steering issues

Try with the tie bar connected to make sure it’s not binding there.

This reminds me that we had a similar issue on the 84 Lazzara I used to run. It was only happening when turning to port. In sharp turns I d turn the wheel and nothing would happened until pressure built up and the rudders would suddenly jump. We checked a number of things incl disconnecting the rudders. The boat sold before we could figure it out. It was power assist hynautic.

I was hoping you would chime in brother.
I remember some of your thoughts during your re-power.
Glad you still are having fantastic results.