Hi Thomas!
Maybe your project will rise the interest of some river enthusiast such as Roberto "Kilo" Chilosi.

He his a rafting guide, a world famous kayaker and also a pretty good hydrospeeder... :-))

He knows very well Valsesia River thought maybe he has some problems with english... :-)))

But he really his the right person you are looking for....

;-)

best regards

Marcone