RE: Aquacraft Mini Rio
Have Epoxy on hand. When the boat comes out the box before running it loosen the rudder screws. Apply Epoxy around where the screws go. Fillet the arms. Let dry overnight the re tighten. These have a tendancy to split around the screw hole.
Next step is to ditch the flex cable right away and get some .047 piano wire/music wire.
I also did the ball links on the rudders...
Probably best hop Ive seen without basically redoing the whole electronics is the VR3 motor for $15. Adding 2S lipo is also a plus I assume.