[otherguy]

I believe the particular servo linked meets the definition of a COTS servo, so per R18, it should be legal as long as it meets the power rating.

I believe R19 is trying to prevent TEAMs from modifying motors/servos/solenoids to give themselves an advantage. You're not making a modification, you're buying a COTS component. If it meets your need and you have reservations, ask for clarification on Q&A, otherwise, bring documentation to the competitions proving its COTS and meets the power rules in the event someone has a question about it.

Note, if you do end up posting to Q&A, dont ask if that particular model/part is legal. You likely wont get an answer. You need to phrase your question in a way that asks for clarification on the rule.