Had a Solar City and El Dorado, and I sold them both (Dumb) thinking I'd get a Gold Strike because I like add-a-ball - still looking... although I might be close now.
Great games all and you're going to love the Target Alpha. Great playfield. Ultimately Target Alpha is my favorite art on all iterations! I agree with the "head in the car" method. It always works for me. Also, if you ever need it, I know CPR does have a reproduction plastic set on the game.
Best of luck and enjoy the game.