So while doing more research on my Fokker V. 11, I came across this web page.
http://www.fokkerdvii.com/pics/
I know that many of the WWI builders out ther may have already found it, but in case you missed it, it contains 3 pages of pictures. And not all DVII's, most are of the factoy and the building process. Some I have found in other places, many I had never seen before. But the one that caught my eye was this one. It showes a DRI tail skid with a control horn to be used for direction control. I never knew a tri plane had that. Learn something new everyday I guess. I also liked the one where the 2 guys were painting a DRI's wing.
I just looked at the DRI picture a bit closer. I do not think its a DRI. It lookes like it is a wooden frame. The web page must have the wrong label on the pic. Oh well, so much for my big discovery.[&o]