After taking way to long, I have redone my jet pack for the last time. It started life as a MB Boba jet pack I got about 4 years ago. Now after I have put new parts and paint, I think it is done. You can see here http://www.thedentedhelmet.com/f28/upgrades-my-mb-jet-pack-stubby-parts-11948/ where I had the parts made. It only weighs about 7 pounds. I almost what to show what it used to look like but, it looked to bad to show. I know the botton vent is not there. I have not had time to make one yet.