Was Ora's middle initial S, for Simpson? If so, i've got a copy of the form he filled out when he registered for the draft. Send me a PM with your email address and i'll send it to you. I'm also a genealogist, and I found a couple more things on him with a quick search.
Unfortunately, I don't have anything from my GG-Uncle. I don't even have a picture of him. I do have a picture of the 307th Infantry, taken at Camp Upton before they left for France. He's in there somewhere.
From what i've been able to piece together, my Great-Grandfather had a break with his mom and step dad during the Great Depression. He was also a very closed mouth man, so there's no stories that came down from him about his brother. When I started my sleuthing, all I knew was that my GG-Uncle was killed in France during WWI and is buried there.
My first stop was the American Battle Monuments Commission. I wrote them a letter and received back information on his unit, when he died and where he was buried. Since I now definately knew what state he was from, a got a copy of his statement of service card from the State of New York. Since he was a casualty, I also got a copy of his burial case file which is where I learned that he died of his wounds in a Red Cross Hospital in Paris. Unfortunately, the NPRC said his records were destroyed, so I don't know when he was wounded or where. The National Archives has all the reports and returns from the 307th, but they aren't on line so I would have to go and do research in person. Maybe one day....