I emailed Bikes at Work and they got back to me quickly. They have 2 options for a Dummy or Xtracycle. You can use the regular hitch or they make one similar to the one Metal Man made. They cation that the one that attachs to the back is limited to a tongue weight of 50 pounds, which is different than carrying capacity so I'm thinking that heavier loads just ride to the back of the trailer. So Metal Man do you have issues with tongue weight?