Great instructions! I replaced the battery, faceplate, backplate, wheel, and center button without any real problems. Took about 2 hours, though! The center button is a tad bit loose…no wiggle room parallel to the surface (when moving my thumb left and right or top and bottom) , but when I touch the button and lift my thumb I can hear and feel it lift upward (perpendicular to the surface) and rattle that way. Perhaps I bent the logic board a bit? I thought it would tighten up once fully assembled but it didn’t. Now I’m wishing I padded it with a bit of foam or something.