Position of feedback loop injection resistor for SMPS?

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treez

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Hello,
In the below schematic (LTspice sim also attached) is R7 a good place for test signal injection for measurement of the feedback loop gain and phase margins (bode plots) with a frequency analyser (eg AP300 by Ridley)?
 

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  • Flyback _TL431_bias_type3.pdf
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  • Flyback _TL431_bias_type3.txt
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