Lights flicker and gauge jumps around???

Yes, When I added the adjustable regulator I was able to adjust my voltage down from 15.6 volts and set it to 14.3 (could have gone lower if I wanted) but the lights were still flickering. I added the relay fed from the relay battery stud (battery is in the trunk) and I triggered the relay from the blue ballast resistor wire (or the wire that you cut off of the center ignition terminal of the regulator if you have a 70 and up car). This fixed the flickering. Hope this helps.