I like to state its due to the shorter contact arms Gottlieb seemed fond of, very touchy on adjustments. Once you get it though, they do seem to run just as long as anything else. Melody been setup in the wife units game room for a few years now and has been perfectly happy. I think I popped the hood to change a lamp and thats been it.

Same; I had a Jungle King that about drove me crazy staying in adjustment and an Orbit I sold cheap as it would not consistently keep track of balls short of a one player game. Gottlieb changed a number of control mechs in this timeframe, not all of them worked out.