Water rudder for RC Airplane floats (foam)

Water rudder for Hobby Zone Super Cub or other floats.
I used a small elastic cord, but a spring would work as well. The assembly screws are 2.5mm x 10mm, the mounting screws are 2mm x 12mm. For mounting to these foam floats, I used canopy glue (any rubberized foam safe glue will work) to glue the mount plate to the float, then used the long 2mm screws through the plate and into the foam

Print with PLA or ABS at 100% infill, only the arm needs supports