Manipulate tension to trigger new gains. Remember, hypertrophy is stimulated mostly by muscular tension. Muscles get the most tension where the resistance curve is at its peak in the concentric (lifting) point of a movement.
For dips, anchor a band with a heavy dumbbell at your feet. Placing the band around your neck looks awkward, but it will naturally bend you forward and cause the pecs to get into a deep stretch. This will also create more tension at the top of the rep.
The strength and conditioning field is like no other. Coaches have bitter enemies and die-hard devotees – and sometimes a person will qualify as both depending on the day of the week. There are insane egos and there are humble, incredibly bright coaches who go unnoticed. Finally, there are a lot of coaches who people really don't get.