Hi Tom
I´m Finn Jacobsen the XML Gauge developer of the Aerosoft Catalina X.
We have not done anything to make the aircraft come "on the step" more realistic, but we have made some custom coding of the water drag to make behaviour on the water more realistic.
Water in FSX ghas become less draggy than it was in FS2004 (remember the "sticky" water !).
But FSX doesn´t sense wether the aircraft is o the step or not. This means that once Your are too slow to be on the step, the aircraft still acts like it is. This means that at slow speed water drag is too low, making stopping the aircraft in the water difficult.
On the Catalina, we have added code to gradually add more drag as the aircraft slows down in the water, effectivly bringing it to a stop.
This also works when accelerating on the water. At first the water is quite draggy, but as Your groundspeed starts to build up, water drag becomes less, like if You come on the step.
I´m sure that it isn´t perfect, but still way better than the default water behaviour.
We have also added invisible watter ruders, that are extended and retracted without any user input.
This has been done to make it easier to control the Catalina i the water. These water rudders will extend when groundspeed gets below appr. 17 kts and will be retracted above.
We have also added code to add more drag from cowlflaps and floats.
Best regards
Finn Jacobsen