I know there are a couple commercial fixtures that attach to a floor jack and help get a door lined up for mounting the hinges. I'm not seeing any DIY versions and I know they have to be out there. I have a trans jack or big floor jack to use. Thought the adjustments in the trans jack might help. So anyone have a fixture they've seen or come up with to share a pic or two of? I always like to see a sample before I go about slapping something together. I've got a couple ideas using wood 2x4 but I have plenty of square and round tubing to weld with too. Something along these lines.