Step 9: Time to tear out your hair!
The principle of fixing the lid to the base is like this:
-Attach the EMR shields we scavenged from the keyboard to the underside of the bezel-lid (i.e. the back of the LCD and Digitiser). We use the screws used to attach the LCD to the bezel lid, through the EMR shield.
-Attach the bezel lid to the base using screws, and a little superglue
Once the Wacom digitiser has been attached to the back of the LCD, and you've tested it using the pen on the screen and are satisfied with the position, you can now close it up under the EMR shields. I made some of the keyholes a little bigger to accommodate the wiring for the LVDS and the Wacom sensor too.
Take the keyboard shield and position it in the base. Measure the distance between the sides and the outer rim of the polycarbonate exterior. Next, take the keyboard shield, and remove the four screw holders on the top left and right of the shield (they should be attached with small phillips screws. The outer two are steel, and the inner two are a white polystyrene). You need to make some packing to extend their height, and I used thin plastic for mine.
Once you've extended the height, reaffix them to the shield and then fit the shield inside the back of the bezel lid. Make sure it is positioned using the measurements you took from the outside of the shell described earlier. Once it's positioned, mark out where the screw holes for the LCD retaining screws are beneath. Drill holes in these positions.
Do exactly the same for the palmrest shield. This one is a little trickier, as you have to line up the screw holes with the battery compartment.
After you've attached the shields to the back of the bezel lid, dry fit them in the base. Check that the screw holes align, and try using a screw in each corner to check the fit. If its a good fit, there will very few gaps between the bezel-lid and the base. If it's a great fit, well, it'll look like the MacTab was manufactured like this!