I think you've hit the nail on the head here Skatezilla. I've been tweaking settings for a couple of days, and came to the conclusion that it doesn't matter.
For the first time since I bought it, I can properly fly the Huey. I spent 2 hours in the Huey pit last night. It's nothing to do with details, it's all about the immersion. I can feel what the airframe is doing! I didn't use the trimmer once and managed to land on all manner of rooftops etc. It was amazing.