Thats not a contradiction, those are instructions for two different things. Paper tuning and broadhead tuning.The Easton tuning guide contradicts itself between the paper tuning and broadhead tuning sections. For a nock left paper tear (which is equivalent to broadheads hitting right of field points), it says move the rest to the right (page 7). But for broadheads hitting right of field points, it says move the rest away from the bow (to the left) for a right-handed shooter (page 11).
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Also, the old weak/stiff arrow advice doesn’t make sense when tuning a modern compound bow shot with a mechanical release. It does make sense for a traditional bow shot with fingers (which is what the Easton guide is geared toward). But modern compound risers are cut way past center (so there’s nothing for the arrow to need to bend around), and a mechanical release eliminates the influence of fingers on the string.
That said, pragmatism is the number one rule in tuning: if moving something one direction doesn’t work, try moving it the opposite direction (regardless of what anyone else says is “correct”).
A mechanical release also removes or almost eliminates the circumstance of being over spined. You can absolutely still be underspined.