I got my Aluminum Shorty today and it's a beautiful thing! It has a nice shiny finish and is flawlessly machined. When I weighed it on the five finger scale (my hand,
) it weighed basically nothing. I cleaned it up and snapped it on my Tornado and it looks excellent! Definitely beats the crap out of a plastic cart in looks and function. I've been dripping with it (obviously) and it performs great. The only negative I can see is that I'm now going to want one for my other two Tornadoes so they can all look so snazzy! It snaps in place and it's definitely not going to fall out. Conversely, it isn't difficult to remove either. I picked aluminum because it's a great conductor and will act as a heatsink for my atomizer while not adding any (noticeable) weight to my Tornado. Very happy with the purchase 
(I can add pics if anyone is interested it what a Tornado/eGo looks like with the aluminum shorty compared to the standard carts and cartomizers.)
(I can add pics if anyone is interested it what a Tornado/eGo looks like with the aluminum shorty compared to the standard carts and cartomizers.)