What's your sense of what game (or games) were used to create your Having Fun? Does the game have a (conversion company) manufacturer's label on it? Is any part of the backglass art original to Bally or is it totally custom? The card looks similar to Broadway '51.
Neat game - cool that you have it working. I'm also curious about the scoring. How do you score points and how do the points translate into games on the reel?
Very cool.