ZED-F9R Pi-Hat questions on calibration and accurately

GPS/GNSS Development Boards
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Calibration: I tried calibrating the board, but it doesn’t seem to fully calibrate. I am not using tick marker from my car. I want to make sure that the IMU is calibrated and that the GPS is accurate. It looks like acceleration due to gravity is correct. I thought I found a mode in the software to calibrate the board, but I can’t find it. I have driven in figure eights, as view the Monitor, some say Calibrating, but then never say Calibrated. One video said that it auto calibrates? I couldn’t tell if this is every time you turn on the system one only ass needed? In the video it shows the guy go into a parking garage, he has accurate measurements once he loses GPS signal (understand would need the tick marks from the car for this).
Is there a list of GPS reference points that I can compare my set up to, to see how accurate my project is? Is there a function in the software to make the unit more accurate (vs just out of the box)? Or is there a recommended filter that I could apply? My friend and I have been trying to write filters, but the results are not great.
Thinking of using this in my FJ60. I was told that if I get my setup accurate for my current location (in Colorado), but then drive the FJ to the other side of the country it might not be accurate, based on the GPS model used? To my understanding if I did something crazy and ship my FJ to Australia to drive through the outback, the GPS would be even more off?

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The F9R is slightly different, but it’ll largely be the same process as described here Accuracy Verification - SparkFun RTK Product Manual

Yep, for when GPS is unavailable you’ll want the wheel ticks to be working and calibrated…also be sure to put the offset (unless you mount the antenna dead-center)

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There are two aspects: IMU calibration and F9R orientation. IMU calibration is happening at each startup (temperature dependent). Orientation may be provided at startup or self determined using the “auto-calibration” option. Calibration is fast is auto-calibration is off. Calibration with auto-calibration is slow and may not converge. It is faster by making 8 shaped drive (best with motorway link loops). Once determined, store it for the next use.

You can see what I did there.

Result in tunnel whitout wheel tick:

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