I have in the past, seen a roll bar on a jeep that was also a small crane. I saw it at Miltruck's place maybe he might have a pic or info on it. Anyway, I have decided I am going to make a crane to go in the head board area of my deuce kind of like that roll bar crane/cherry picker. I have a container converter dolly that is only a partial. On it, it has 4 hydraulic cyls that should make for good articulation. A while ago, I picked up a hydraulic pump that is 24v, made to move the stern drive of a boat. What wall thickness do you think I should use for maybe a 1000lb lift arm. I will have to see what size steel the dolly is made out of, as it has already been paid for and just sitting around. I also have been wondering about making the lift arm able to swing whatever it picks up from next to the bed to inside the bed. How could I make some kind of friction brake to keep a load under control?