Not to mention there's multiple schools of thought on 'proper' geometry too! B3 makes a great case for his logic, I've read other theories regarding where the rocker 'should' be at 'what point' in it's sweep.
I know one thing: I personally wouldn't make a decision on whether or not to correct without checking just how far off it is in the first place! In an all-stock motor with stock lifts, I might not even bother to check. But as soon as I change anything (heads, rockers, etc) I'd want to measure it all out.
That said, just changing the adjusters to a locking style probably wouldn't merit that much work or even a correction.
