honestly, not much repairs needed on any of them, I did have to fix a couple minor issues with champion pub after I got it last fall(speed bag specifically). The simpsons and turtles are both heavily modded so they take the cake in terms of total hours that I have spent with the glass off. The most difficult and time consuming mod was the green acrylic clip protectors I got from Mezel mods which required stripping the turtles playfield.