I've owned 2 TZs. One with just about every mod I've ever heard of, another with none. The TZ with no mods played far better. Most of the mods, besides looking like cheap crap, get in the way of seeing the ball. I had the clock out of the game to fix it, played a few games without the clock and it greatly improved my enjoyment of the game. The clock is useless and without it installed I could see the ball go around the loops and it helped me time the upper flipper shots easier. The game felt like it had more flow.
The two TZ mods that aren't bad are the gumballs and the piano mod. The piano shot looks so drab without the piano around it.
Quoted from wbradley:In the case of TZ, I am in agreeance with many that dislike all the extra toys people install that just clutter the playfield. All my mods were below the surface so to speak, like the gumballs with gumball machine lighting, proto flashers for the gum and ball inserts, etc.
However, I did cave and buy the slot machine that sits on top of the habittrail over the slot kickout. I was just impressed with the fact that the reels turn when the ball passes through. Also the slot and piano locations are vital to completeing the door to play LITZ. I am now considering adding in the piano but it is pricey for a cut/drilled old McDonald's toy.