Instructor D.T.
This was basically the Gi version of the No-gi half guard pass except for emphasis on lapel grips. The submission setup was a transition from kesa getame to knee-on-belly mount, switching grips on collar to form choke with blade of forearm and OP's own arm being pressed down across his face, applying pressure with chest/belly on the elbow. A variant choke was covered but due to my inexperience I was content with simply working with the first choke (blood chokes).
Transitioning from kesa getame to knee-on-belly mount is a motion worth practicing. My transitions felt awkward. I wasn't exactly sure how to post but I am now imagining that posting on the inside elbow, driving all weight down upon OP is the proper way in order to maintain constant 3rd point pressure (thereby preventing escape or reversal).