Fuel gauge. Again.

What I did was pull sender out of tank, rig up some wiring to set the sending unit on thr ground. I got a 0 to 1K variable resistor. I wired the resistor into the hot wire to unit. I adjusted till I got the desired results on the gauge, then without moving the setting, removed the variable resistor, read the value with a VOM, then just purchased a carbon resistor matching the value on the variable. wired in the resistor somewhere in the line to the tank. works great now.