RE: what 2.4 GHZ Tx and Rx are you all using
Like Dan said or
the 3PM-X with the 603FF or 603FS receiver.
or if you feel like spending more money the 4PK,
I cannot comment on the Airtronic since I have no personal experience with their radio system.
you can also use Corrosion X to water proof, but the best solution is a good waterproof radio box.
Dan.
by the way Dan, great test.