Fuel sending units read WRONG time after time!

Pawned said
My mod to the fuel guage works. I will open a new thread with the details

Later"
As I sit here and think about it, Maybe my modification did nothing and the gauge alwas showed empty because it was neat empty. I filled it up and adjusted my mod to show the gauge of the fuel tank full.
As the tank empties I will monitor it and If I find my modification did indeed make a difference, I will post it.
Maybe I outsmarted myself. I will advise accordingly

My 5vdc regulator bit the dust. I have pulled the cluster out and I am sure my previous 2 approaches based on variable resistors was the wrong way to go about it.
I am now working with a variety of voltage regulators. To control the voltages on the test bench I am trying to adjust the voltages. The 100 ohm resistors are 500 ohm resistors, I reread the labels, I did not buy the wrong resistors.