"I have a very large window opposite the fridge in the slide, plan would be to remove it to do the swap (I have to reseal all the windows at some point anyway, so a good excuse) "
Might need a forklift that goes up high to do that. Picturing the guy outside standing on a chair holding his end of the fridge ending up in hospital after the whole fridge lands on him when the chair tips over or somesuch. :)
You do need a plan for handling the moment the guy inside can't hold his end anymore, and then getting the fridge down to ground level all under control.
