I am reminded of a helping out a fellow, a cabinet maker, with moving a 15' loa church pew he'd built for a local church. It was "J" shaped. Three of us moving it and the one on the bottom end of the "J" stumbled. I was at the turn of the pew and not wanting to damage the pew or anyone hauling during the fall, I took up the slack to the detriment of the muscles in my back. Saved the pew but it took four visits to a DC for back repairs.

Have you figured a plan for install? Will it be at the dock or on the hard? Temp overhead trolley or six men and a boy? Curious readers want to know...oh, wait, that's the National Enquirerer.