Sphero Water Hazard Ramp

This is a ramp, designed with the intent of making a "water hazard" for a sphero obstacle course. Put one ramp over the end of a water filled tub, and sphero should be able to make it in and out of the water. I was thinking of a "plastic shoe box" type container when I designed the ramp. I have oriented it for easier printing, but it is meant to have the short side dipping into the water, and the end of the long side taped to the floor.
I cannot test this yet, and it will take a pretty large printer to do this in one piece, so you'll probably have to break it up and glue the pieces together.
I am also unsure about the buoyancy of the printed part, higher infills may reduce that if it is problematic, or just use some tape to secure it.