I can't imagine why this disassembly is called "moderate." This has to be one of the easiest Macs to open up and gain access. Interestingly, the very next model, the 1144, is one of the most difficult and painful macs (that I know) to open up for access to the most rudimentary parts (drive and memory). The designers of the 1144+ iMacs should all be taken outside and shot!
Maybe the Quadra 700 is easier - no tools required! Or the G4 and G5 towers. Dunno about the later ones...