nomad, which advice is btter?

1) yeah, adjust the screw all you want mate, only does idle...
2) no, CO screw adjusts the multiplier! dont touch


now, given tht there are 2 possibilities as to wht could happen if you touch the screw, which advice do you think is sensible to give to people on a public BB? (remembering most people believe EVERYTHING they read on the internet )