I am planning to replace my CPU on my Mac Pro 5,1 and I wonder how much Arctic thermal paste ARCTIC MX-4 2g I should place on my new CPU? I saw some people on videos placing a dot in the centre or a line from side to side,....Any advice what is the best way? And I also wonder when screwing off the towers do I need to count the cycles of each screw and do the same when screwing them back on? since I read that with the Mac Pro 5,1 when you unscrew them the tower will kind of pop up and when you screw them back you will notice once it stop, so you don't need to count turns. Any advice?