RE: E-flite J-3 Cub 25 ARF
Yeah, we can test a scale take-off and then see what it can do on full throttle. Assuming calm water, it's a blast to let it ride on step for a while.
The water rudder and linkage assembled fine and I did not see any excessive resistance added to the rudder throw. My only modification was to make two of the full brass strips into half strips for easier mounting. I used a Dremel tool to cut off the unwanted end.
I also managed to break one of the quick links so I replaced it with a similar size one from my own supply. There was about 1/2" excess cable that I cut off from the float end.
When testing the water rudder assembly, make sure that it follows the normal rudder direction and that it can flip up with little resistance if it hits a rock or some obstruction in the water.