Here we are then, loads of pics.any photos of hoe the linkages on the back work and what they move?
I guess a 6m head on the output limits your options a lot
Links being made
The back of the turbine showing the king guide vane and shaft which is turned (slowly) by a dc motor and reduction box.
And the front, with all guide vanes fitted.
Lastly, some pics of one on a bigger, but still not massive, scale.