C120 & Evolution Autopilot (ACU200/EV1/P70s)

[PetrelMarine]

Hi Chuck

Just wanted to get some clarifications after completing this installation yesterday. The system comprises an EV1, ACU400, P70s integrated using a SeatalkNG converter with a legacy system, C120, ST(Depth/Speed/Wind), Raystar125 and Wireless Remote.
All components have the latest software as previously discussed.

I tested the system today and everything is working really well. However the issue as identified previously with the "No Navigation Data" is occurring when the autopilot is placed in "Track" mode. I set the Variation to On and entered the local value as outlined in the Software History section for the P70s.
This cleared the issue using that workaround/fix.

My questions are:

1. Does the owner now have to update this value at the P70s every time he travels away from his home port to another location with a different value?

2. Is this issue a result of the SeatalkNG converter being unable to construct/transfer the Magnetic Variation PGN from the Seatalk variation value as derived from the GPS variation field, which the C120 is using?

3. Is there a software update planned to address this issue?

4. If the answer to Q3 is no, what is the solution to ensure automatic variation updates? Is a SeatalkNG GPS required?

5. Will there be any abnormal affects with the autopilot if the owner forgets to update the manual variation and travels outside of the local area. He travels to Alaska from Seattle and I am concerned about this possible scenario.

Thanks for your help Chuck, always appreciated.