Getting that drop target working correctly is crucial for this game to function correctly I reckon. Sweet look job so far!
Funny you should mention the Drop Target. The first time I played a ST TNG was at a dealers' in the mid 2000's. I was with Marco at the time, and we played doubles. He started a game, and pulled the trigger for the first ball, and the drop target was stuck down. Right off the bat, the rules were out of whack. Then there were issues with divertors and optos. The game was not tuned at all. As I started to learn the rules myself, I found the game to be an excellent and challenging game - when set up correctly.
The Drop Target is crucial. Replacement of all optos is mandatory. Once restored and 100% dialed in, this game has a deep and difficult ruleset that puts some modern titles to shame.