If your unlucky like me and your battery has exploded corrosion all over your logic board, a little bit of 70% to 90% rubbing alchohol on a que tip cleans it right off!
You can gently use the tip of a screwdriver to align the antenna plate screw holes as long as your hard drive pegs are aligned. *DO NOT FORCE* as your hard drive may just not be in the right place.
Even better, you can just use one of your screwdrivers if you do it carefully, just push out each side a little bit and rock out the logic board. No special tool needed. Just be careful not to damage your logic board and/or apply too much force.
On reassembly, if you're having trouble lining up the cowling with the screw holes, you can try pulling the logic board out a tad and set the cowling in place. Just try not to damage the cowling or the inside of the outer case when sliding it back in!