No tank tests and no other tests, we did not even have the D40 in the water until after the boat show when she was launched last year, so it was pure luck..
The handling is very good with no issues, they turn without sliding and without losing speed. They have no pitching and lifts the bow just a minimum to get on plane. So the performance figures are a combination of the hull shape and the low weight plus of course the modern diesel engines from VolvoPenta. We will soon test a D40 with the latest Mercruisers as well.
We also have forward sloping windows on fishing boats and smaller multi-purpose boats like the Targa line from Finland. But those are higher and slower than ours. In our archipelago with many thousand islands, it is essential to have a good and glare-free view, especially when it is dark.