A Frame TTT ideas

Has anyone built or at least worked up plans for an A-frame type TTT similar to the Aliner? My wife likes these to have stand up headroom and low drag when towing.
I like the Rolite style, but four fold-outs look to be a bit much. I was hoping Andrew would put together some plans, but he must be too busy.
I wonder how the spring arrangement would be handled for either type. Has anyone thought about this.
Thanks for a great forum.
Don
I like the Rolite style, but four fold-outs look to be a bit much. I was hoping Andrew would put together some plans, but he must be too busy.
I wonder how the spring arrangement would be handled for either type. Has anyone thought about this.
Thanks for a great forum.
Don