Answer to: I got the nand error, what precautions should I be taking?That spacer is just a spacer. Do not screw the long screw in so tight that the retaining plate bends, and then everything should function fine without it.
Answer to: How to fix a broken iPad mini retina screenIt's more difficult than full size iPads. A lot of tape needs to be transferred and the LCD needs to be carefully separated. Any DIY kit should be sure to include a digitizer that does not require soldering.