Ralph, that looks very good...now i see what you mean by double hinge...
how tall is your top and the length looks about 6 feet...
i had no idea that you could run the top at those speeds...thats good to know
i dont know how tall it is, will measure sunday when i take it out.. she had me sit in the boat then she took a measure ment from the floor to the top of my head then added 18 inches (i think) and thats how she came up with how tall it was going to be.. i cant stand straight up but i can hunch and walk in my boat..
now do you want it mounted inboard or out board? yes it makes a difference..
do yourself a favor and go have it custom made, or at least go to a shop and ask

? like i said there is way more to it than you think
ralph