the problem with the above valve is :
if the screw inside the pontoon is broken, you cannot replace it because its size doesn't allow to pass it through the 32mm hole.
But are you sure of 32 ...?
None of those I have are so small, most are 36 to 42mm.
I have old design Bravo valves with a screw slim enough to pass
Possibly the screw in the design could be machined with a lathe to allow it to pass, but you should cut the pontoon fabric to the valve size, the larger the hole size, the easier the internal screw will pass through