Model Version 4: Changing Light Colours and Adding Speedboat

So the first thing today looking at my model is that I do not like these colours either. Colour is really important for its aesthetic appeal so finding the right colourway is going to be a goal for me over the course of this project. I feel that this might be the right one for my model at this stage anyway..

Another thing that I have done in this version is adding the speedboat entity as I am thinking ahead so that one could drive the boat around and through my model while it can move or something along those lines. However I have struck a problem with the physics of the speedboat which is clear from my printscreens below - the boat does not stay on the water when AI/Physics is applied to my model. It bounces into the sky and continues to do this until it either explodes or sits above the water..

Anyway, these are some printscreens of this version:

The speedboat sitting on the water with no physics applied..

The speedboat flying into the air when it is applied.. 

Another angle whilst it is in the air..

On its way back down to the water..

The speedboat comes to rest sitting above the water as shown..

This is an issue that I will need to work out how to solve somehow as it is beginning to annoy me.