How would you use a carpenter level to determine if the dish angle is correct? This is an offset dish so the face of the dish is not aimed at the actual elevation look angle. On a typical offset dash, the face of the dish is aimed between 22 and 26° lower than the actual look angle up to the satellite. If you know the offset angle of the dish, you can add the carpenters level angle (measured on the face of the dish) to the offset angle to equal the elevation angle to the target satellite. Probably best if you start by using the stamped elevation angles on the mount. These sometimes can be a few degrees off, but is a good starting point. The stamped angles on the mount will only be as accurate as the pole is plumb and level that you're mounting the dish on.
I'm sure you've read my advice to others, but here is a quick summary of how to aim your dish:
With a compass, identify the approximate compass angle for the target satellite and identify a landmark in the far distance like a tree or telephone pole that you can reference for an approximate position for the satellite.
Set the dish elevation angle for the target satellite. Lightly tighten the nuts on the elevation mount.
Point the LNBF support arm towards the landmark that you identified as in alignment with the target satellite.
Set the LNBF skew rotation angle to the approximate angle. I see that your skew angle for 97w is 10°, so set it initially straight up and down (12 o'clock) will be close enough to identify and lock onto the 97w satellite.
Connect your satellite meter to the LNBF and power on the meter.
Select the target satellite and select an active transponder from the list or enter in the transponder parameters.
While closely watching the signal quality meter reading, SLOWLY pan the dish east and west approximately 15° on either side of the landmark. If no signal quality reading is detected, increase or decrease the dish elevation angle in 1° increments and slowly repeat the pan east and west on either side of the landmark. The dish elevation may be up to 77 to 10° above or below the stamped reading. Some dishes are very poor quality and the stamping is way off.
Repeat until the signal quality meter reading is found.
Optimize the signal quality meter reading by panning east and west, adjusting the elevation angle up or down, adjusting the LNBF skew clockwise or counterclockwise and by sliding the LNBF towards or away from the reflector.
Perform a blind scan on the satellite to find active transponders and channels. Now you're ready to watch free TV. Enjoy!