Ok, steps taken:
- remove plastic bottom (pray off)
- unscrew metal base - be very careful - wifi connection cable is super short
- unscrew wifi connector and undo the wifi connector cable
- unscrew fan (4 screws) and lift it up
- remove two large screws on the motherboard
- undo two connectors at the back of the motherboard (one is psu, second no idea)
- slide off the motherboard
- unscrew ram cage (4 screws)
- remove rubber sides from ram
- remove ram
- put new ram in - do it properly (there are two tiny holes on the bottom of the sticks - they need to align once inserted)
- reverse and enjoy.
Be super careful and take your time. I am not great at writing things up, sorry folks.