[DG] [DG11] ST6001 Diagnostic Help Please.....

[djangotoo]

I recently updated my electronics but kept the ST6001 pilot comprising: ST6001 Control Unit, S3 Computer and an L&S Hydraulic Linear Drive (2201788).

The rest of the system is:
2 E70367 Axiom 9 RV, 3.10.42 (connected via raynet cable).
1 E70327 i70 display
1 E70476 AIS 700
1 E70498 Quantum 2 Radar
1 E70010 iTC-5 with new depth and speed and wind transducers
1 E22158 ST1 to STng adaptor to interface with existing ST6001 Smart Pilot

1. With the system in Response Level 1, the system takes quite a while to settle onto course but it eventually gets it. It does struggle however in higher sea state and gusty conditions.
Response Level 2 appears to work when motoring in flat sea state but wont hold course when gusty.
Response Level 3 doesn't seem to drive at all.

2. System works (in good conditions) in wind vane mode but wont drive to waypoint. The course on control unit decreases and the drive follows - always to port.

Id appreciate some thoughts about what could be happening here - some suggested tests to isolate the fault would be well received.

Thanks in anticipation