Great guide - ice tray idea was good - wrote numbers of the compartments with a sharpie, and wrote them on the printed guide. Took around 1.5 hours to do a keyboard (ie, bottom half of laptop) swap.
Noted that the rubber gasket around the fan didnt quite go back properly (should be noted it seems to need to be fitted before the logic board goes back).
Also I picked up a replacement bottom half from ebay with the speakers and mike already in place, so that removed the most dubious part of the exercise.
Wouldnt call this hard - id call it medium…. Hard is a screen swap on a 3DS - I failed on that one… RIP 3ds
Also was surprised how easy the screen connector was to open / close, and by how small the flaps are on the other flatflex connectors.