I have been reading your blog. I took a Sidemount class from Paul Murphy (Texas). The reason for the intro class was to determine what method I wanted to do my Tec training...SM or Traditional (Back Doubles). I have opted to do Tec in SM.
In one of your earlier posts you mentioned issues with the sizing/length of the bungee cords (chocker cords). I am fairly broad. Regardless of the standard lengths offered by Dive Rite Nomad or the Hollis SMS, it can feel like a constrictor as the valves start digging into my ribs. Simple solution is to place a double ender as a spacer between the snaps of the two chockers in front of your chest. This will give you an extra 4" as well as a double ender available in case of an emergency need.