Andrew, you are HARDCORE on the 18 squared!... sounds like you're getting ready to sell one... yes, you should listen to that "sell" voice in your head...

Judging from your trailer situ, it sounds like you are not a believer in the aforementioned tube-tramp modifications?
That gooseneck on the crossbeam instead of the mast sounds novel, but it seems like normal mast rotation would be stressing the lower battens, and perhaps require a lot of re-adjusting of inhaul and outhaul...?
PS: "Dobbs full tilt" brings up no images on Google, but "Tornado tilt trailer" does, Dobbs at the top o' the list!