Patrick Johnson said:

FYI, "aiming to make the contact points collide" is done "by feel", just like all aiming methods. Starting with a known visible "reference" alignment like "fractions" doesn't change that. Even if the shot is an exact fractional alignment (needing no adjustments) you only know that because you've learned to recognize it "by feel".

pj
chgo

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bbb said:

Interesting
, I use the analogy of trying to hit the mailbox with your mirror

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