4 ms·
It's not a rule (that I know of), but it's a standard part of the more serious training classes. The companies I'm familiar with have been teaching it that way
by beerandt 6y ago
It's not a rule (that I know of), but it's a standard part of the more serious training classes. The companies I'm familiar with have been teaching it that way for 15+ years. Edited to "often"