At the next opportunity, I will try to take some more closeup pictures.  My son can then include some measurements.  His basic trailer is 10' x 4'.  The boom is about six feet tall with a seven foot arm.  He built the trailer when he was a sophomore in high school and has been adding to it ever since.  You could almost say it has been a "labor of love." :wink: The trailer with all its attachments and gizmos now weighs 6000 pounds.