Thanks to Ali who I have spoken to for putting my mind at rest. Even with an offer to come flying with me to test the model and CoG out.

It has been decided to try the test flight at 140mm CoG.

If it's too far forward then it's never going to be as bad a a too far rearward CoG.

That's also alot closer to the 30% of cord on the wing, so I feel much happier than that.

Sorry for taking over you thread CarsII.

I'll report how the flight has gone.

Steve