So I re-filmed myself doing this movement and its mobility. I had been doing the im incorrectly, however, the change to better form didn't prove to set back my ability very much. I also worked to ensure that my elbow was in line with my body as it twists. Let me know how the movements look.
Thanks.
Elbow Taps in Side Plank (MN/PE2):
Trunk Twists (MN/PE2-im):