I have what is basically a table frame I built. I've used it for many things. Made of 1x1 square tubing 5 feet long 4 feet high and 18" wide with frameing for another shelf 3 feet below the top. Just an open frame for welding things up. I'm thinking of useing this as a frame jig when I go to cut my frame up. I can tack weld rods from the holder frame to the bike frame to keep things in alignment. All the cutting and extending is in the front of the bike so the back half will be braced with 6 rods to keep things from moving around during welding, just have to grind the welds when I'm finished.
Plan is to build this over the winter and have it ready for the car show this spring