used the pea-size blob in the center method.
Look to see what the top of the chip and the bottom of your cooler look
like after a removal ( or re-application )
The paste should have covered the entire surface evenly.
I prep my chip and HS base with Isopropyl alcohol.
Compressed air to blow dust.
I have been putting 4 little blobs near center for each corner and one in center.
( these chips have alot of surface )
Then, use a tooth pick to smear out flat to the edges.
( use something that will not leave debris - smear it like your plastering )
I visually look for no metal showing, then place it in the mb.
Just be careful not to add to much paste.
( just remove excess, and smooth out again )
My Noctua's are very sensitive to dust.
( max fan rotation is 1500rpm and my idle is 1450 )
Cleaning is a monthly occurrence for me.
( removing the fans to clean the blades also )
Some have reported that Noctua's have bent at the base.
They are flexible, and need to be handled carefully.