Nut Action -

nut slot height   Dan nut slot files

The art part of it is the nut needs to be at the right height so that the slot sits proud of the first fret The balance is the physical height

That's a FLAT radius for a Strat! Think of it as an acoustic neck, then: verify whether the nut slot itself is flat or curved on the bottom  This particular nut we are using requires a 35mm string spacing; over or under would also be acceptable Any of the previous three nuts

thunderstruck slot review This particular nut we are using requires a 35mm string spacing; over or under would also be acceptable Any of the previous three nuts John Carruthers shows us the proper way to adjust the nut on a Stratocaster This video is step