1x nut (mine is 2" long)
1x bolt that fits the nut
1x 20" of 1/4" thick x 1" flat bar
1x 5" of 1/4" thick x 1.5" flat bar
1x 6" of 1/4" thick x 1.5" flat bar
1x 2" round bar
Obviously your going to want everything as close to 90 degrees and parallel as possible so everything lines up nicely when complete.
On the end of the 1.5" bar I welded a washer for a nice clamping surface.
Draw a center line down the middle of the 1.5, 6" long bar and make a mark about 1/2" from the bottom and another 1/4" about that mark.
Sorry no picture of this step so i drew one :)
I used a drill slightly larger than the bolt and made a hole 1/4" from the top for the tightening bolt
I used a plasma cutter to make the slot for the long flat bar. Make the opening slightly to small to fit the flat bar and use a file to take it down by hand so the bar just fits in but also slides smoothly.
You don't want it to be tight but if its too loose then there will be too much play and it will operate sloppy.
This is the probably the most important part of the whole build, explained why on the last step