Actually, the tower itself looks fine... It's the cabling nightmare inside that looks like hell.
My worst hack on my A4000D so far has been my attempt at making new pegs for my A3640, since the originals are MIA. Right now I have two PC motherboard pegs superglued together, and it's still not quite long enough to support it.
The craziest hack, I think, is supergluing the SIMMs in place, since the lock tabs have all snapped off. Ahh if only that 8MB chip jumper worked...