It was a bit nerve wracking when it came to the ZIF connector because it is so small and delicate and my eyesight is not great. However I did disconnect and reconnect without damaging. The paperclip tool is a very good recommendation and luckily I had a couple of oversized ones which I have not added to my tool kit. I would suggest making two to allow you to pull on both sides at the same time. So I put everything back together again and now we have a beautifully silent (working!!) iMac. We had got so used to the constant buzzing noise so it is now fantastic to have silence. I am looking forward to repairing more!! One idea that I have is to buy a broken mac air on ebay and repair that for my son.