That's why I used the word "correctly". lol The for instance I can give is my truck, Gladys. I got an oversize tank for it from LMC. Went from the factory 19 gallon to a 38 gallon, so the stock sending unit is useless. But the Bronco has a 33 gallon tank. I used that sender and bent the arm so that it read E when it has about two or three gallons left in the bottom. Perfect. All the guys on the Ford forum were cryin about how there was no sending unit for that tank and they didn't know how to modify their old one, blah blah blah. I told them about the Bronco sender and they still complained it wouldn't "read right" in between F and E. Some people will just never "get it".