Thanks for always being detailed with your answers.
Revers Pec Dec vs. 45 degree row
My understanding is that the reverse Pec dec, although still great for rear Delts, does not take the Delts into a fully shortened position because of the alignment of the movement, and that the movement aligns more with the mid traps. My understanding is A 45 degree row where the arm moves into full extension will fully shorten the rear Delt because that angle is more aligned with the muscle insertion points.
Is there a reason, to choose reverse Pec dec over a 45 degree angle row? Does the Pec dec load more in the lengthened position?
Additionally, Should reverse cable flys be performed with a 45 degree angle?