Our method is precise, not a guess about what seems to work. If the guy who came up with the slug method was wearing a tin-foil hat they'd tell you to wear one of those!

The PoolForum method is
1) You lower pH to 7.0-7.2--since alk and pH are closely linked and move together, this pulls the alk down some.
2) now you aerate to raise pH without raising alk as well--there are reasons why aeration raises pH but doesn't raise alk, but the chemists here can explain it in the china shop. Raising pH with Borax or Soda Ash will raise alk back--soda ash makes it even higher.
3) Lower pH again to 7.0-7.2, again pulling alk down
4) Aerate again to raise pH without raising alk.
5) keep repeating as you ratchet alk down.
6) When you hit your target, aerate to get your pH up and treat your pH normally.

There's no hit or miss, this is how you do it.