I tend to keep my elbow close to my rib when sending. This style is closest to the British sending technique. I tap with my middle finger using my right hand.
The feel of the key is the best I've ever used besides a paddle. Even with my fingers freezing, I could send fairly well and effortlessly.
I didn't want the knob on top and he had a few paddles left from the previous model. In addition, I replaced the screw for the leg mount to the key with a thumb screw. The standard one was bit too small requiring the used of a fine screwdriver to mount and unmount the key.