I finally fixed my drop targets today... I had the common issue of them not dropping if hit hard. I moved the springs up on the hooks about 18 windings based on info posted here. That initially seemed to work, then the targets starting resetting 3 times and staying down (another issue I've read about). I backed the springs about halfway and the targets are working great now.
I noticed the springs in mine were blue, the ones in the machine posted here were red. Not sure if that indicates a different tension or not. This was just one of those minor annoyances I put up with for too long. It didn't really start bothering me until I got a feel for the rules and could tell how bad the game was ripping me off.