A lovely kiter friend in his mid seventies, is an avid water ski enthusiast for half a decade, kindly gave me an old 'water ski'. Probably older than some people reading this post. Asked a friend to weld up a tuttle box out of stainless.
Height from top of board to foil fuselage is 1250mm.
Weight of stainless tuttle box 3kg.

Nice. Be sure that the mounting bolts are above and beyond the stress task... or it you could be saying goodbye to the whole lot.

I still have one of those boards.
the McSki was the prequel to wake boards.
Came out Around 1984/5.
the first water ski to start sideways.
but mine doesn't have the small fin boxes.
heaps of fun to jump wakes.
the foam centre and plastic outer is a problem as if let get hot in sun the plastic would deform and delaminates from foam. So bottom tends to go wavey.
i would say it's too narrow to use as a foil board but good luck

I think the swing weight on that might be problematic. Will you be able to ride it? Sure, anyone can ride just about anything with enough practice. However I believe you will progress and have more fun with a simple plywood shaped board with more width.

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dorothyinste said..
....
Weight of stainless tuttle box 3kg.
...

My new board weighs less than that complete.

All this begs the obvious question, "Why?".

Obviously you don't need a reason. You can do anything you like. But is there a master plan? A benefit to be derived other than the novelty value?

The sensation of height above the water was the initial attraction. Also, a narrow board allows for getting closer to the water when really pressing hard for an upwind reach.

Madness I say!.

You might need to mount the turtlebox further forward.