The foam damping I have but haven't installed yet, I've got to pull the whole thing apart because we're shifting states soon, so I'll get that done then.
The crossover... what needs changing on it? I haven't looked at it much yet, and it is only for very quiet listening at the moment, but that will change.
Let's just say there is no real "crossover" inside besides a few bypassed caps and shenanigans to cut off a few frequencies before roll-off. One reason why they are cheap. I had help from a friend make the crossover for mine, bit beyond my basic knowledge on zobels network.