I think the guy who built it had/has a place ON the lake..over by the Wolfeboro docks..with a "Lift". I think he just decided to build a ""Model" of the
Mount for his own amusement. ...I'm guessing the "Model" is 1/4 scale...maybe prior to the Full Scale Mount adding 20 feet.
Anywho: RC plane modelers build in 1/4 scale all the time....OR some percentage of Full Scale.
I build scale model boats...to
"Fine Scale"....For Museum Display rather than for the water......Just to see if I can do it.

NB