I just received a Severne Enigma Slalom boom as well. 180-226. It has a slender grip area and large diameter tubes by the extension area. Wide tail piece like the Enigma Formula as well. 8" wide for each of them.
In the pictures I have the new Enigma slalom boom laying on top of the Blue Severne Line boom I had been using the last few years. I like the camo color scheme. Can't wait to try it out!