What's new in v2.3.0:
Ullage-based level — matches the app and your gauge, no more invert guessing.
Tank orientation option (vertical/horizontal) you asked for. Vertical = linear; horizontal = proper round-cylinder segment curve (tested: half-full → 50%).
Calibration options: tank height (44), gallons-per-inch (5.9, or 0 = auto), raw-to-inch divisor (254) — all defaulted to match your tank.
New sensors: Oil height and Air height (so you can compare directly to the app), plus the device's raw percentage kept as a disabled diagnostic.
Full Changelog: 2.2.0...2.3.0