“I was surprised to find this actually attaches with sticky pads, but hey, what do I know! The pins that attch it to the Pi are very small, as are the corresponding parts on the Pi itself, so do be very careful when attaching them. The instructions are quite clear that if you get it wrong, you should write it off and not try fixing anything. And once on, you should consider it a permanent fixture. For a small sum, having active cooling has to be worth it.”