Swamp boat Prop Guard

This is my first design and I am hoping I am doing it right. If there are any recommendations, please let me know.

This is a Prop Guard for RCWeinstadt, Swamp boat. http://www.thingiverse.com/thing:929056.

I run the boat in a soft sided swimming pool and was worried that the prop would slice the side of the pool. I started with just a bumper and then decided it would be better to have a full cover to prevent accidents.