While I do not have one on my turck, nor even know anybody with oneit, I DO think that the DOR SBS is a very nice design for the very reasons he cites.
I have always been concerned about the frame rails transferring flex into the steering box via the sector shaft when the box is supported on both frame rails, like all the other SBS designs. Perhaps for a highway queen, the design of the SBS does not matter, but where I drive, both on and off road, there IS substantial frame flex. That is actually one of the most important reasons that I chose to use the Defiant formed steel SBS, as I felt it offered MUCH more potential flex then the traditional box tube SBS, while still solidly supporting the steering box. Unfortunately Defiant no longer makes truck parts, though there is someone else offering the identical design on ebay for a more then reasonable price.
The only problem I know about the DOR, is that often he gets VERY behind (like months) on his orders and people get legitemately upset with him for that.
My only other concern with the DOR SBS, is that while I am sure it is stout, I have NEVER liked the looks of the fit and finish based ONLY on looking closely atthe pics of his designs on his website, as well as other peoples pics.
Soooooo....all that being said, I DO like the design of his SBS. If you end up ordering and installing it, please be sure to post pics and give us your opinion.
Meantime, I'll try to find the link for the ebay seller for the formed steel SBS for you to look at/