Än update I'm now in Croatia and have tried the boat out.
A very good and stable boat.
To tow the kids on wakeboarding and skies was not an problem.
They got up quickly and had a smooth ride.
I had to try it my self and I did get up it was an struggle to get up and well up it didn't went good. But then the driver and the kid onborad moved the their wheigt backwards and the boat ran faster and even I had a good ride believe it or not but I really waked behinde the boat.
Send some photos of it later