I drew up a rough sketch and figured my angles first. I cut the slots into the tubing using our CNC plasma table and a piece of plate as a stop. Having a laser locator lets you really line up stuff like this.
![Image](http://i197.photobucket.com/albums/aa63/Griffs_photos/20160712_160808_zpsaebpxnoy.jpg)
I already had some 1x2" bar with a hole and a radius on one end to act as a pivot for the top plates. Welded these up with my TIG machine.
![Image](http://i197.photobucket.com/albums/aa63/Griffs_photos/20160712_171741_zps42pxxtn5.jpg)
Next,I jigged the pieces up on my table and tacked them all together.
![Image](http://i197.photobucket.com/albums/aa63/Griffs_photos/20160713_110227_zpsyz8qkmef.jpg)
Speaking of the jig table, sometimes it just really handy for holding that piece in a good position to weld. It made getting into the tight angle a fairly easy.
![Image](http://i197.photobucket.com/albums/aa63/Griffs_photos/20160713_152714_zpsgqvzsedm.jpg)
I cut out these tabs from 1/2 plate and welded them to a piece of C channel to make the top pivot plates.
![Image](http://i197.photobucket.com/albums/aa63/Griffs_photos/20160713_143517_zpshkbtcl6b.jpg)
Closeup of the weld. I'd like to get a bit more consistent. I really don't get as much tig steel practice as I'd like.
![Image](http://i197.photobucket.com/albums/aa63/Griffs_photos/20160713_144114_zpsln18k9m5.jpg)
We cut out some chain plates and bent up some handles for these.
![Image](http://i197.photobucket.com/albums/aa63/Griffs_photos/20160713_162450_zpsghcnxzyc.jpg)
Here they are in use. I had to order the chains I want to use with these. They will be welded to one side and attached with the chain plate to the other.
![Image](http://i197.photobucket.com/albums/aa63/Griffs_photos/20160713_163527_zpssdogchsc.jpg)