I have a Rio EP that my daughters run while we are at the pond and am looking into getting another one so they will each have there own. I have tweaked the setup on the first one by removing the left rudder blade and moving the tabs up ( they were hanging below the hull causing un-nessesary drag). I am planning to mod the new one right out of the box but it can't be too fast or daughter won't want to run it. Here is what I'm planning.

Rio Ep
Traxxas Titan 21T motor
Aquacraft 30A 2-3s lipo ready esc for brushed motors
3s 35c 5000Mah battery
I want to pick up a Grim 42x55 metal prop and also an ABC 1714/2 to try
OSE 3.18mm to 3mm motor coupler
OSE .130 cable system for 3/16 props

I realize I will have to modify the stuffing tube at the transom to accept the 3/16" prop shaft but that shouldn't be a huge deal.

Does this sound like a workable system or are there other better recommendations?

Jeff Lee