Having flown this on the water a few times I have grown tired of the thing getting on step and veering to the left or right on its own, so I ventured down the path of doing a mod so this thing so it has a water Rudder. I hope this helps you if you need a water rudder too.

You can find this model at:
https://www.hobbyzone.com/hobbyzone/H...

The Floats can be found at:
https://www.hobbyzone.com/specials/en...

Receiver AR630: https://www.horizonhobby.com/product/...

ESC Avian 30amp: https://www.horizonhobby.com/product/...

Links to the parts I used for the rudder
Rudder EFLA55001: https://www.horizonhobby.com/product/...

Rudder Mount DuBro 156: https://www.horizonhobby.com/product/...

Push rod set HBZ3218: https://www.horizonhobby.com/product/...