Thank you for the guide. I fitted 32GB (2x16 kit) Crucial RAM in 25 minutes for £82, a considerable saving over Apple prices. If you have the Ifixit tool kit from a few years ago (like mine) check it thoroughly before you try this upgrade. The T5 Torx in my kit wasn’t a T5 it was a Star 1.2 and as it was the first time I’d ever used it, naturally I thought all would be well…. grrrr!