ok so working on restoring my 83 hi lo, i ran into a slight problem. i have had it for about a month. got it home and was not sure how to put it up. used battery and up up up it went. great. 2 days ago i wanted to clean and sand the upper part. ( my wife wanted to put a turquoise stripe on the upper half. ) i lowered it fine, but when i finished what i was doing , i needed it back up . so plugged it back into the 120 and you could hear it (the motor) running then switch off and reset . ( not enought power scotty) . yet it goes up fine with a battery. hmmm , fluid is fine. does anyone else have this problem? is 120 not enough juice?